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c906108c | 1 | /* Machine independent support for SVR4 /proc (process file system) for GDB. |
2555fe1a | 2 | |
32d0add0 | 3 | Copyright (C) 1999-2015 Free Software Foundation, Inc. |
2555fe1a | 4 | |
c3f6f71d JM |
5 | Written by Michael Snyder at Cygnus Solutions. |
6 | Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others. | |
c906108c | 7 | |
a9762ec7 JB |
8 | This file is part of GDB. |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 3 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
c906108c | 22 | |
c3f6f71d JM |
23 | #include "defs.h" |
24 | #include "inferior.h" | |
45741a9c | 25 | #include "infrun.h" |
c3f6f71d JM |
26 | #include "target.h" |
27 | #include "gdbcore.h" | |
65554fef | 28 | #include "elf-bfd.h" /* for elfcore_write_* */ |
c3f6f71d | 29 | #include "gdbcmd.h" |
0fda6bd2 | 30 | #include "gdbthread.h" |
7f7fe91e | 31 | #include "regcache.h" |
28439f5e | 32 | #include "inf-child.h" |
88fc5eb7 | 33 | #include "filestuff.h" |
c906108c | 34 | |
c3f6f71d | 35 | #if defined (NEW_PROC_API) |
0df8b418 | 36 | #define _STRUCTURED_PROC 1 /* Should be done by configure script. */ |
c3f6f71d | 37 | #endif |
c906108c | 38 | |
c3f6f71d | 39 | #include <sys/procfs.h> |
37de36c6 | 40 | #ifdef HAVE_SYS_FAULT_H |
c3f6f71d | 41 | #include <sys/fault.h> |
37de36c6 KB |
42 | #endif |
43 | #ifdef HAVE_SYS_SYSCALL_H | |
c3f6f71d | 44 | #include <sys/syscall.h> |
37de36c6 | 45 | #endif |
2555fe1a | 46 | #include "gdb_wait.h" |
0fda6bd2 JM |
47 | #include <signal.h> |
48 | #include <ctype.h> | |
92107356 | 49 | #include "gdb_bfd.h" |
44270758 | 50 | #include "inflow.h" |
4e73f23d | 51 | #include "auxv.h" |
d1a7880c | 52 | #include "procfs.h" |
27087a3d | 53 | #include "observer.h" |
0fda6bd2 | 54 | |
77382aee PA |
55 | /* This module provides the interface between GDB and the |
56 | /proc file system, which is used on many versions of Unix | |
57 | as a means for debuggers to control other processes. | |
58 | ||
59 | Examples of the systems that use this interface are: | |
60 | ||
61 | Irix | |
62 | Solaris | |
63 | OSF | |
77382aee PA |
64 | AIX5 |
65 | ||
66 | /proc works by imitating a file system: you open a simulated file | |
67 | that represents the process you wish to interact with, and perform | |
68 | operations on that "file" in order to examine or change the state | |
69 | of the other process. | |
70 | ||
71 | The most important thing to know about /proc and this module is | |
72 | that there are two very different interfaces to /proc: | |
73 | ||
74 | One that uses the ioctl system call, and another that uses read | |
75 | and write system calls. | |
76 | ||
77 | This module has to support both /proc interfaces. This means that | |
78 | there are two different ways of doing every basic operation. | |
79 | ||
80 | In order to keep most of the code simple and clean, I have defined | |
81 | an interface "layer" which hides all these system calls. An ifdef | |
82 | (NEW_PROC_API) determines which interface we are using, and most or | |
83 | all occurrances of this ifdef should be confined to this interface | |
84 | layer. */ | |
85 | ||
86 | /* Determine which /proc API we are using: The ioctl API defines | |
87 | PIOCSTATUS, while the read/write (multiple fd) API never does. */ | |
c906108c | 88 | |
c3f6f71d | 89 | #ifdef NEW_PROC_API |
c906108c | 90 | #include <sys/types.h> |
2978b111 | 91 | #include <dirent.h> /* opendir/readdir, for listing the LWP's */ |
c3f6f71d | 92 | #endif |
c906108c | 93 | |
c3f6f71d JM |
94 | #include <fcntl.h> /* for O_RDONLY */ |
95 | #include <unistd.h> /* for "X_OK" */ | |
53ce3c39 | 96 | #include <sys/stat.h> /* for struct stat */ |
c906108c | 97 | |
103b3ef5 MS |
98 | /* Note: procfs-utils.h must be included after the above system header |
99 | files, because it redefines various system calls using macros. | |
100 | This may be incompatible with the prototype declarations. */ | |
101 | ||
103b3ef5 MS |
102 | #include "proc-utils.h" |
103 | ||
77382aee | 104 | /* Prototypes for supply_gregset etc. */ |
c60c0f5f MS |
105 | #include "gregset.h" |
106 | ||
c3f6f71d | 107 | /* =================== TARGET_OPS "MODULE" =================== */ |
c906108c | 108 | |
77382aee | 109 | /* This module defines the GDB target vector and its methods. */ |
c906108c | 110 | |
c0939df1 | 111 | static void procfs_attach (struct target_ops *, const char *, int); |
52554a0e | 112 | static void procfs_detach (struct target_ops *, const char *, int); |
28439f5e | 113 | static void procfs_resume (struct target_ops *, |
2ea28649 | 114 | ptid_t, int, enum gdb_signal); |
bfedc46a | 115 | static void procfs_interrupt (struct target_ops *self, ptid_t); |
a14ed312 | 116 | static void procfs_files_info (struct target_ops *); |
28439f5e PA |
117 | static void procfs_fetch_registers (struct target_ops *, |
118 | struct regcache *, int); | |
119 | static void procfs_store_registers (struct target_ops *, | |
120 | struct regcache *, int); | |
94bedb42 TT |
121 | static void procfs_pass_signals (struct target_ops *self, |
122 | int, unsigned char *); | |
7d85a9c0 | 123 | static void procfs_kill_inferior (struct target_ops *ops); |
136d6dae | 124 | static void procfs_mourn_inferior (struct target_ops *ops); |
77382aee | 125 | static void procfs_create_inferior (struct target_ops *, char *, |
136d6dae | 126 | char *, char **, int); |
117de6a9 | 127 | static ptid_t procfs_wait (struct target_ops *, |
4fcbb494 | 128 | ptid_t, struct target_waitstatus *, int); |
e96027e0 PA |
129 | static enum target_xfer_status procfs_xfer_memory (gdb_byte *, |
130 | const gdb_byte *, | |
131 | ULONGEST, ULONGEST, | |
132 | ULONGEST *); | |
4ac248ca | 133 | static target_xfer_partial_ftype procfs_xfer_partial; |
a14ed312 | 134 | |
28439f5e | 135 | static int procfs_thread_alive (struct target_ops *ops, ptid_t); |
a14ed312 | 136 | |
e8032dde | 137 | static void procfs_update_thread_list (struct target_ops *ops); |
d3581e61 | 138 | static char *procfs_pid_to_str (struct target_ops *, ptid_t); |
c3f6f71d | 139 | |
2e73927c TT |
140 | static int proc_find_memory_regions (struct target_ops *self, |
141 | find_memory_region_ftype, void *); | |
be4d1333 | 142 | |
fc6691b2 TT |
143 | static char * procfs_make_note_section (struct target_ops *self, |
144 | bfd *, int *); | |
be4d1333 | 145 | |
5461485a | 146 | static int procfs_can_use_hw_breakpoint (struct target_ops *self, |
f486487f | 147 | enum bptype, int, int); |
1e03ad20 | 148 | |
7bc112c1 | 149 | static void procfs_info_proc (struct target_ops *, const char *, |
145b16a9 UW |
150 | enum info_proc_what); |
151 | ||
c47ffbe3 | 152 | #if defined (PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) |
77382aee PA |
153 | /* When GDB is built as 64-bit application on Solaris, the auxv data |
154 | is presented in 64-bit format. We need to provide a custom parser | |
155 | to handle that. */ | |
c47ffbe3 VP |
156 | static int |
157 | procfs_auxv_parse (struct target_ops *ops, gdb_byte **readptr, | |
77382aee | 158 | gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp) |
c47ffbe3 | 159 | { |
f5656ead | 160 | enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ()); |
c47ffbe3 VP |
161 | gdb_byte *ptr = *readptr; |
162 | ||
163 | if (endptr == ptr) | |
164 | return 0; | |
77382aee | 165 | |
c47ffbe3 VP |
166 | if (endptr - ptr < 8 * 2) |
167 | return -1; | |
168 | ||
e17a4113 | 169 | *typep = extract_unsigned_integer (ptr, 4, byte_order); |
c47ffbe3 VP |
170 | ptr += 8; |
171 | /* The size of data is always 64-bit. If the application is 32-bit, | |
172 | it will be zero extended, as expected. */ | |
e17a4113 | 173 | *valp = extract_unsigned_integer (ptr, 8, byte_order); |
c47ffbe3 VP |
174 | ptr += 8; |
175 | ||
176 | *readptr = ptr; | |
177 | return 1; | |
178 | } | |
179 | #endif | |
180 | ||
d1a7880c | 181 | struct target_ops * |
28439f5e | 182 | procfs_target (void) |
c3f6f71d | 183 | { |
28439f5e PA |
184 | struct target_ops *t = inf_child_target (); |
185 | ||
77382aee PA |
186 | t->to_create_inferior = procfs_create_inferior; |
187 | t->to_kill = procfs_kill_inferior; | |
188 | t->to_mourn_inferior = procfs_mourn_inferior; | |
189 | t->to_attach = procfs_attach; | |
190 | t->to_detach = procfs_detach; | |
191 | t->to_wait = procfs_wait; | |
192 | t->to_resume = procfs_resume; | |
193 | t->to_fetch_registers = procfs_fetch_registers; | |
194 | t->to_store_registers = procfs_store_registers; | |
195 | t->to_xfer_partial = procfs_xfer_partial; | |
2455069d | 196 | t->to_pass_signals = procfs_pass_signals; |
77382aee | 197 | t->to_files_info = procfs_files_info; |
bfedc46a | 198 | t->to_interrupt = procfs_interrupt; |
28439f5e | 199 | |
e8032dde | 200 | t->to_update_thread_list = procfs_update_thread_list; |
77382aee PA |
201 | t->to_thread_alive = procfs_thread_alive; |
202 | t->to_pid_to_str = procfs_pid_to_str; | |
28439f5e | 203 | |
77382aee | 204 | t->to_has_thread_control = tc_schedlock; |
28439f5e PA |
205 | t->to_find_memory_regions = proc_find_memory_regions; |
206 | t->to_make_corefile_notes = procfs_make_note_section; | |
145b16a9 | 207 | t->to_info_proc = procfs_info_proc; |
c47ffbe3 VP |
208 | |
209 | #if defined(PR_MODEL_NATIVE) && (PR_MODEL_NATIVE == PR_MODEL_LP64) | |
28439f5e | 210 | t->to_auxv_parse = procfs_auxv_parse; |
c47ffbe3 VP |
211 | #endif |
212 | ||
77382aee | 213 | t->to_magic = OPS_MAGIC; |
28439f5e PA |
214 | |
215 | return t; | |
c3f6f71d | 216 | } |
c906108c | 217 | |
c3f6f71d JM |
218 | /* =================== END, TARGET_OPS "MODULE" =================== */ |
219 | ||
77382aee PA |
220 | /* World Unification: |
221 | ||
222 | Put any typedefs, defines etc. here that are required for the | |
223 | unification of code that handles different versions of /proc. */ | |
c3f6f71d JM |
224 | |
225 | #ifdef NEW_PROC_API /* Solaris 7 && 8 method for watchpoints */ | |
37de36c6 | 226 | #ifdef WA_READ |
19958708 | 227 | enum { READ_WATCHFLAG = WA_READ, |
c3f6f71d JM |
228 | WRITE_WATCHFLAG = WA_WRITE, |
229 | EXEC_WATCHFLAG = WA_EXEC, | |
230 | AFTER_WATCHFLAG = WA_TRAPAFTER | |
231 | }; | |
232 | #endif | |
233 | #else /* Irix method for watchpoints */ | |
19958708 | 234 | enum { READ_WATCHFLAG = MA_READ, |
c3f6f71d JM |
235 | WRITE_WATCHFLAG = MA_WRITE, |
236 | EXEC_WATCHFLAG = MA_EXEC, | |
237 | AFTER_WATCHFLAG = 0 /* trapafter not implemented */ | |
238 | }; | |
239 | #endif | |
240 | ||
37de36c6 KB |
241 | /* gdb_sigset_t */ |
242 | #ifdef HAVE_PR_SIGSET_T | |
243 | typedef pr_sigset_t gdb_sigset_t; | |
244 | #else | |
245 | typedef sigset_t gdb_sigset_t; | |
246 | #endif | |
247 | ||
248 | /* sigaction */ | |
249 | #ifdef HAVE_PR_SIGACTION64_T | |
250 | typedef pr_sigaction64_t gdb_sigaction_t; | |
251 | #else | |
252 | typedef struct sigaction gdb_sigaction_t; | |
253 | #endif | |
254 | ||
255 | /* siginfo */ | |
256 | #ifdef HAVE_PR_SIGINFO64_T | |
257 | typedef pr_siginfo64_t gdb_siginfo_t; | |
258 | #else | |
a5362b9a | 259 | typedef siginfo_t gdb_siginfo_t; |
37de36c6 KB |
260 | #endif |
261 | ||
3c95f01c JB |
262 | /* On mips-irix, praddset and prdelset are defined in such a way that |
263 | they return a value, which causes GCC to emit a -Wunused error | |
264 | because the returned value is not used. Prevent this warning | |
265 | by casting the return value to void. On sparc-solaris, this issue | |
266 | does not exist because the definition of these macros already include | |
267 | that cast to void. */ | |
268 | #define gdb_praddset(sp, flag) ((void) praddset (sp, flag)) | |
269 | #define gdb_prdelset(sp, flag) ((void) prdelset (sp, flag)) | |
270 | ||
37de36c6 KB |
271 | /* gdb_premptysysset */ |
272 | #ifdef premptysysset | |
273 | #define gdb_premptysysset premptysysset | |
274 | #else | |
275 | #define gdb_premptysysset premptyset | |
276 | #endif | |
277 | ||
278 | /* praddsysset */ | |
279 | #ifdef praddsysset | |
280 | #define gdb_praddsysset praddsysset | |
281 | #else | |
3c95f01c | 282 | #define gdb_praddsysset gdb_praddset |
37de36c6 KB |
283 | #endif |
284 | ||
285 | /* prdelsysset */ | |
286 | #ifdef prdelsysset | |
287 | #define gdb_prdelsysset prdelsysset | |
288 | #else | |
3c95f01c | 289 | #define gdb_prdelsysset gdb_prdelset |
37de36c6 KB |
290 | #endif |
291 | ||
292 | /* prissyssetmember */ | |
293 | #ifdef prissyssetmember | |
294 | #define gdb_pr_issyssetmember prissyssetmember | |
295 | #else | |
296 | #define gdb_pr_issyssetmember prismember | |
297 | #endif | |
298 | ||
299 | /* As a feature test, saying ``#if HAVE_PRSYSENT_T'' everywhere isn't | |
300 | as intuitively descriptive as it could be, so we'll define | |
301 | DYNAMIC_SYSCALLS to mean the same thing. Anyway, at the time of | |
302 | this writing, this feature is only found on AIX5 systems and | |
303 | basically means that the set of syscalls is not fixed. I.e, | |
304 | there's no nice table that one can #include to get all of the | |
305 | syscall numbers. Instead, they're stored in /proc/PID/sysent | |
306 | for each process. We are at least guaranteed that they won't | |
307 | change over the lifetime of the process. But each process could | |
77382aee | 308 | (in theory) have different syscall numbers. */ |
37de36c6 KB |
309 | #ifdef HAVE_PRSYSENT_T |
310 | #define DYNAMIC_SYSCALLS | |
311 | #endif | |
c3f6f71d JM |
312 | |
313 | ||
314 | ||
315 | /* =================== STRUCT PROCINFO "MODULE" =================== */ | |
316 | ||
317 | /* FIXME: this comment will soon be out of date W.R.T. threads. */ | |
318 | ||
319 | /* The procinfo struct is a wrapper to hold all the state information | |
320 | concerning a /proc process. There should be exactly one procinfo | |
321 | for each process, and since GDB currently can debug only one | |
322 | process at a time, that means there should be only one procinfo. | |
323 | All of the LWP's of a process can be accessed indirectly thru the | |
324 | single process procinfo. | |
325 | ||
326 | However, against the day when GDB may debug more than one process, | |
327 | this data structure is kept in a list (which for now will hold no | |
328 | more than one member), and many functions will have a pointer to a | |
329 | procinfo as an argument. | |
330 | ||
331 | There will be a separate procinfo structure for use by the (not yet | |
332 | implemented) "info proc" command, so that we can print useful | |
333 | information about any random process without interfering with the | |
0df8b418 | 334 | inferior's procinfo information. */ |
c3f6f71d JM |
335 | |
336 | #ifdef NEW_PROC_API | |
337 | /* format strings for /proc paths */ | |
338 | # ifndef CTL_PROC_NAME_FMT | |
339 | # define MAIN_PROC_NAME_FMT "/proc/%d" | |
340 | # define CTL_PROC_NAME_FMT "/proc/%d/ctl" | |
341 | # define AS_PROC_NAME_FMT "/proc/%d/as" | |
342 | # define MAP_PROC_NAME_FMT "/proc/%d/map" | |
343 | # define STATUS_PROC_NAME_FMT "/proc/%d/status" | |
344 | # define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/8096/lstatus") | |
345 | # endif | |
346 | /* the name of the proc status struct depends on the implementation */ | |
347 | typedef pstatus_t gdb_prstatus_t; | |
348 | typedef lwpstatus_t gdb_lwpstatus_t; | |
349 | #else /* ! NEW_PROC_API */ | |
350 | /* format strings for /proc paths */ | |
351 | # ifndef CTL_PROC_NAME_FMT | |
352 | # define MAIN_PROC_NAME_FMT "/proc/%05d" | |
353 | # define CTL_PROC_NAME_FMT "/proc/%05d" | |
354 | # define AS_PROC_NAME_FMT "/proc/%05d" | |
355 | # define MAP_PROC_NAME_FMT "/proc/%05d" | |
356 | # define STATUS_PROC_NAME_FMT "/proc/%05d" | |
357 | # define MAX_PROC_NAME_SIZE sizeof("/proc/ttttppppp") | |
358 | # endif | |
0df8b418 | 359 | /* The name of the proc status struct depends on the implementation. */ |
c5aa993b | 360 | typedef prstatus_t gdb_prstatus_t; |
c3f6f71d JM |
361 | typedef prstatus_t gdb_lwpstatus_t; |
362 | #endif /* NEW_PROC_API */ | |
c906108c | 363 | |
c3f6f71d JM |
364 | typedef struct procinfo { |
365 | struct procinfo *next; | |
366 | int pid; /* Process ID */ | |
367 | int tid; /* Thread/LWP id */ | |
c906108c | 368 | |
c3f6f71d JM |
369 | /* process state */ |
370 | int was_stopped; | |
371 | int ignore_next_sigstop; | |
c906108c | 372 | |
19958708 | 373 | /* The following four fd fields may be identical, or may contain |
c3f6f71d JM |
374 | several different fd's, depending on the version of /proc |
375 | (old ioctl or new read/write). */ | |
c906108c | 376 | |
c3f6f71d | 377 | int ctl_fd; /* File descriptor for /proc control file */ |
77382aee PA |
378 | |
379 | /* The next three file descriptors are actually only needed in the | |
380 | read/write, multiple-file-descriptor implemenation | |
381 | (NEW_PROC_API). However, to avoid a bunch of #ifdefs in the | |
382 | code, we will use them uniformly by (in the case of the ioctl | |
383 | single-file-descriptor implementation) filling them with copies | |
384 | of the control fd. */ | |
c3f6f71d JM |
385 | int status_fd; /* File descriptor for /proc status file */ |
386 | int as_fd; /* File descriptor for /proc as file */ | |
c906108c | 387 | |
c3f6f71d | 388 | char pathname[MAX_PROC_NAME_SIZE]; /* Pathname to /proc entry */ |
c906108c | 389 | |
c3f6f71d | 390 | fltset_t saved_fltset; /* Saved traced hardware fault set */ |
37de36c6 KB |
391 | gdb_sigset_t saved_sigset; /* Saved traced signal set */ |
392 | gdb_sigset_t saved_sighold; /* Saved held signal set */ | |
393 | sysset_t *saved_exitset; /* Saved traced system call exit set */ | |
394 | sysset_t *saved_entryset; /* Saved traced system call entry set */ | |
c906108c | 395 | |
c3f6f71d | 396 | gdb_prstatus_t prstatus; /* Current process status info */ |
c906108c | 397 | |
c3f6f71d JM |
398 | #ifndef NEW_PROC_API |
399 | gdb_fpregset_t fpregset; /* Current floating point registers */ | |
c5aa993b | 400 | #endif |
37de36c6 KB |
401 | |
402 | #ifdef DYNAMIC_SYSCALLS | |
403 | int num_syscalls; /* Total number of syscalls */ | |
404 | char **syscall_names; /* Syscall number to name map */ | |
405 | #endif | |
19958708 | 406 | |
c3f6f71d | 407 | struct procinfo *thread_list; |
c906108c | 408 | |
c3f6f71d JM |
409 | int status_valid : 1; |
410 | int gregs_valid : 1; | |
411 | int fpregs_valid : 1; | |
412 | int threads_valid: 1; | |
413 | } procinfo; | |
c906108c | 414 | |
c3f6f71d | 415 | static char errmsg[128]; /* shared error msg buffer */ |
c906108c | 416 | |
c3f6f71d | 417 | /* Function prototypes for procinfo module: */ |
c906108c | 418 | |
a14ed312 KB |
419 | static procinfo *find_procinfo_or_die (int pid, int tid); |
420 | static procinfo *find_procinfo (int pid, int tid); | |
421 | static procinfo *create_procinfo (int pid, int tid); | |
422 | static void destroy_procinfo (procinfo * p); | |
004527cb | 423 | static void do_destroy_procinfo_cleanup (void *); |
a14ed312 KB |
424 | static void dead_procinfo (procinfo * p, char *msg, int killp); |
425 | static int open_procinfo_files (procinfo * p, int which); | |
426 | static void close_procinfo_files (procinfo * p); | |
37de36c6 KB |
427 | static int sysset_t_size (procinfo *p); |
428 | static sysset_t *sysset_t_alloc (procinfo * pi); | |
429 | #ifdef DYNAMIC_SYSCALLS | |
430 | static void load_syscalls (procinfo *pi); | |
431 | static void free_syscalls (procinfo *pi); | |
432 | static int find_syscall (procinfo *pi, char *name); | |
433 | #endif /* DYNAMIC_SYSCALLS */ | |
c906108c | 434 | |
e9ef4f39 | 435 | static int iterate_over_mappings |
b8edc417 JK |
436 | (procinfo *pi, find_memory_region_ftype child_func, void *data, |
437 | int (*func) (struct prmap *map, find_memory_region_ftype child_func, | |
77382aee | 438 | void *data)); |
e9ef4f39 | 439 | |
c3f6f71d JM |
440 | /* The head of the procinfo list: */ |
441 | static procinfo * procinfo_list; | |
c906108c | 442 | |
77382aee PA |
443 | /* Search the procinfo list. Return a pointer to procinfo, or NULL if |
444 | not found. */ | |
c906108c | 445 | |
19958708 | 446 | static procinfo * |
fba45db2 | 447 | find_procinfo (int pid, int tid) |
c5aa993b | 448 | { |
c3f6f71d | 449 | procinfo *pi; |
c906108c | 450 | |
c3f6f71d JM |
451 | for (pi = procinfo_list; pi; pi = pi->next) |
452 | if (pi->pid == pid) | |
453 | break; | |
c906108c | 454 | |
c3f6f71d JM |
455 | if (pi) |
456 | if (tid) | |
457 | { | |
458 | /* Don't check threads_valid. If we're updating the | |
459 | thread_list, we want to find whatever threads are already | |
460 | here. This means that in general it is the caller's | |
461 | responsibility to check threads_valid and update before | |
462 | calling find_procinfo, if the caller wants to find a new | |
77382aee | 463 | thread. */ |
c3f6f71d JM |
464 | |
465 | for (pi = pi->thread_list; pi; pi = pi->next) | |
466 | if (pi->tid == tid) | |
467 | break; | |
468 | } | |
c906108c | 469 | |
c3f6f71d JM |
470 | return pi; |
471 | } | |
c906108c | 472 | |
77382aee | 473 | /* Calls find_procinfo, but errors on failure. */ |
c906108c | 474 | |
c3f6f71d | 475 | static procinfo * |
fba45db2 | 476 | find_procinfo_or_die (int pid, int tid) |
c3f6f71d JM |
477 | { |
478 | procinfo *pi = find_procinfo (pid, tid); | |
c906108c | 479 | |
c3f6f71d | 480 | if (pi == NULL) |
0fda6bd2 JM |
481 | { |
482 | if (tid) | |
3e43a32a MS |
483 | error (_("procfs: couldn't find pid %d " |
484 | "(kernel thread %d) in procinfo list."), | |
0fda6bd2 JM |
485 | pid, tid); |
486 | else | |
8a3fe4f8 | 487 | error (_("procfs: couldn't find pid %d in procinfo list."), pid); |
0fda6bd2 | 488 | } |
c3f6f71d JM |
489 | return pi; |
490 | } | |
c906108c | 491 | |
77382aee PA |
492 | /* Wrapper for `open'. The appropriate open call is attempted; if |
493 | unsuccessful, it will be retried as many times as needed for the | |
494 | EAGAIN and EINTR conditions. | |
19958708 | 495 | |
77382aee PA |
496 | For other conditions, retry the open a limited number of times. In |
497 | addition, a short sleep is imposed prior to retrying the open. The | |
498 | reason for this sleep is to give the kernel a chance to catch up | |
499 | and create the file in question in the event that GDB "wins" the | |
500 | race to open a file before the kernel has created it. */ | |
19958708 | 501 | |
4d1bcd09 KB |
502 | static int |
503 | open_with_retry (const char *pathname, int flags) | |
504 | { | |
505 | int retries_remaining, status; | |
506 | ||
507 | retries_remaining = 2; | |
508 | ||
509 | while (1) | |
510 | { | |
511 | status = open (pathname, flags); | |
512 | ||
513 | if (status >= 0 || retries_remaining == 0) | |
514 | break; | |
515 | else if (errno != EINTR && errno != EAGAIN) | |
516 | { | |
517 | retries_remaining--; | |
518 | sleep (1); | |
519 | } | |
520 | } | |
521 | ||
522 | return status; | |
523 | } | |
524 | ||
77382aee PA |
525 | /* Open the file descriptor for the process or LWP. If NEW_PROC_API |
526 | is defined, we only open the control file descriptor; the others | |
527 | are opened lazily as needed. Otherwise (if not NEW_PROC_API), | |
528 | there is only one real file descriptor, but we keep multiple copies | |
529 | of it so that the code that uses them does not have to be #ifdef'd. | |
530 | Returns the file descriptor, or zero for failure. */ | |
c906108c | 531 | |
c3f6f71d | 532 | enum { FD_CTL, FD_STATUS, FD_AS }; |
c906108c | 533 | |
c3f6f71d | 534 | static int |
fba45db2 | 535 | open_procinfo_files (procinfo *pi, int which) |
c3f6f71d | 536 | { |
0fda6bd2 | 537 | #ifdef NEW_PROC_API |
c3f6f71d | 538 | char tmp[MAX_PROC_NAME_SIZE]; |
0fda6bd2 | 539 | #endif |
c3f6f71d JM |
540 | int fd; |
541 | ||
77382aee PA |
542 | /* This function is getting ALMOST long enough to break up into |
543 | several. Here is some rationale: | |
544 | ||
05b4bd79 | 545 | NEW_PROC_API (Solaris 2.6, Solaris 2.7): |
77382aee PA |
546 | There are several file descriptors that may need to be open |
547 | for any given process or LWP. The ones we're intereted in are: | |
548 | - control (ctl) write-only change the state | |
549 | - status (status) read-only query the state | |
550 | - address space (as) read/write access memory | |
551 | - map (map) read-only virtual addr map | |
552 | Most of these are opened lazily as they are needed. | |
553 | The pathnames for the 'files' for an LWP look slightly | |
554 | different from those of a first-class process: | |
555 | Pathnames for a process (<proc-id>): | |
556 | /proc/<proc-id>/ctl | |
557 | /proc/<proc-id>/status | |
558 | /proc/<proc-id>/as | |
559 | /proc/<proc-id>/map | |
560 | Pathnames for an LWP (lwp-id): | |
561 | /proc/<proc-id>/lwp/<lwp-id>/lwpctl | |
562 | /proc/<proc-id>/lwp/<lwp-id>/lwpstatus | |
563 | An LWP has no map or address space file descriptor, since | |
564 | the memory map and address space are shared by all LWPs. | |
565 | ||
566 | Everyone else (Solaris 2.5, Irix, OSF) | |
567 | There is only one file descriptor for each process or LWP. | |
568 | For convenience, we copy the same file descriptor into all | |
569 | three fields of the procinfo struct (ctl_fd, status_fd, and | |
570 | as_fd, see NEW_PROC_API above) so that code that uses them | |
571 | doesn't need any #ifdef's. | |
572 | Pathname for all: | |
573 | /proc/<proc-id> | |
574 | ||
575 | Solaris 2.5 LWP's: | |
576 | Each LWP has an independent file descriptor, but these | |
577 | are not obtained via the 'open' system call like the rest: | |
578 | instead, they're obtained thru an ioctl call (PIOCOPENLWP) | |
579 | to the file descriptor of the parent process. | |
580 | ||
581 | OSF threads: | |
582 | These do not even have their own independent file descriptor. | |
583 | All operations are carried out on the file descriptor of the | |
584 | parent process. Therefore we just call open again for each | |
0df8b418 | 585 | thread, getting a new handle for the same 'file'. */ |
c3f6f71d JM |
586 | |
587 | #ifdef NEW_PROC_API | |
77382aee PA |
588 | /* In this case, there are several different file descriptors that |
589 | we might be asked to open. The control file descriptor will be | |
590 | opened early, but the others will be opened lazily as they are | |
591 | needed. */ | |
c3f6f71d JM |
592 | |
593 | strcpy (tmp, pi->pathname); | |
0df8b418 | 594 | switch (which) { /* Which file descriptor to open? */ |
c3f6f71d JM |
595 | case FD_CTL: |
596 | if (pi->tid) | |
597 | strcat (tmp, "/lwpctl"); | |
598 | else | |
599 | strcat (tmp, "/ctl"); | |
4d1bcd09 | 600 | fd = open_with_retry (tmp, O_WRONLY); |
e28cade7 | 601 | if (fd < 0) |
c3f6f71d JM |
602 | return 0; /* fail */ |
603 | pi->ctl_fd = fd; | |
604 | break; | |
605 | case FD_AS: | |
606 | if (pi->tid) | |
0df8b418 | 607 | return 0; /* There is no 'as' file descriptor for an lwp. */ |
c3f6f71d | 608 | strcat (tmp, "/as"); |
4d1bcd09 | 609 | fd = open_with_retry (tmp, O_RDWR); |
e28cade7 | 610 | if (fd < 0) |
c3f6f71d JM |
611 | return 0; /* fail */ |
612 | pi->as_fd = fd; | |
613 | break; | |
614 | case FD_STATUS: | |
615 | if (pi->tid) | |
616 | strcat (tmp, "/lwpstatus"); | |
617 | else | |
618 | strcat (tmp, "/status"); | |
4d1bcd09 | 619 | fd = open_with_retry (tmp, O_RDONLY); |
e28cade7 | 620 | if (fd < 0) |
c3f6f71d JM |
621 | return 0; /* fail */ |
622 | pi->status_fd = fd; | |
623 | break; | |
624 | default: | |
625 | return 0; /* unknown file descriptor */ | |
626 | } | |
627 | #else /* not NEW_PROC_API */ | |
77382aee PA |
628 | /* In this case, there is only one file descriptor for each procinfo |
629 | (ie. each process or LWP). In fact, only the file descriptor for | |
630 | the process can actually be opened by an 'open' system call. The | |
631 | ones for the LWPs have to be obtained thru an IOCTL call on the | |
632 | process's file descriptor. | |
633 | ||
634 | For convenience, we copy each procinfo's single file descriptor | |
635 | into all of the fields occupied by the several file descriptors | |
636 | of the NEW_PROC_API implementation. That way, the code that uses | |
637 | them can be written without ifdefs. */ | |
c3f6f71d JM |
638 | |
639 | ||
640 | #ifdef PIOCTSTATUS /* OSF */ | |
0df8b418 | 641 | /* Only one FD; just open it. */ |
e28cade7 | 642 | if ((fd = open_with_retry (pi->pathname, O_RDWR)) < 0) |
c3f6f71d | 643 | return 0; |
0df8b418 | 644 | #else /* Sol 2.5, Irix, other? */ |
c3f6f71d JM |
645 | if (pi->tid == 0) /* Master procinfo for the process */ |
646 | { | |
4d1bcd09 | 647 | fd = open_with_retry (pi->pathname, O_RDWR); |
e28cade7 | 648 | if (fd < 0) |
c3f6f71d JM |
649 | return 0; /* fail */ |
650 | } | |
651 | else /* LWP thread procinfo */ | |
652 | { | |
653 | #ifdef PIOCOPENLWP /* Sol 2.5, thread/LWP */ | |
654 | procinfo *process; | |
655 | int lwpid = pi->tid; | |
656 | ||
0df8b418 | 657 | /* Find the procinfo for the entire process. */ |
c3f6f71d JM |
658 | if ((process = find_procinfo (pi->pid, 0)) == NULL) |
659 | return 0; /* fail */ | |
660 | ||
0df8b418 | 661 | /* Now obtain the file descriptor for the LWP. */ |
e28cade7 | 662 | if ((fd = ioctl (process->ctl_fd, PIOCOPENLWP, &lwpid)) < 0) |
c3f6f71d | 663 | return 0; /* fail */ |
0df8b418 MS |
664 | #else /* Irix, other? */ |
665 | return 0; /* Don't know how to open threads. */ | |
c3f6f71d JM |
666 | #endif /* Sol 2.5 PIOCOPENLWP */ |
667 | } | |
668 | #endif /* OSF PIOCTSTATUS */ | |
669 | pi->ctl_fd = pi->as_fd = pi->status_fd = fd; | |
670 | #endif /* NEW_PROC_API */ | |
c906108c | 671 | |
c3f6f71d JM |
672 | return 1; /* success */ |
673 | } | |
c906108c | 674 | |
77382aee PA |
675 | /* Allocate a data structure and link it into the procinfo list. |
676 | First tries to find a pre-existing one (FIXME: why?). Returns the | |
677 | pointer to new procinfo struct. */ | |
c906108c | 678 | |
c3f6f71d | 679 | static procinfo * |
fba45db2 | 680 | create_procinfo (int pid, int tid) |
c3f6f71d | 681 | { |
0b62613e | 682 | procinfo *pi, *parent = NULL; |
c906108c | 683 | |
0d06e24b | 684 | if ((pi = find_procinfo (pid, tid))) |
0df8b418 | 685 | return pi; /* Already exists, nothing to do. */ |
c906108c | 686 | |
0df8b418 | 687 | /* Find parent before doing malloc, to save having to cleanup. */ |
c3f6f71d JM |
688 | if (tid != 0) |
689 | parent = find_procinfo_or_die (pid, 0); /* FIXME: should I | |
690 | create it if it | |
0df8b418 | 691 | doesn't exist yet? */ |
c906108c | 692 | |
8d749320 | 693 | pi = XNEW (procinfo); |
c3f6f71d JM |
694 | memset (pi, 0, sizeof (procinfo)); |
695 | pi->pid = pid; | |
696 | pi->tid = tid; | |
c906108c | 697 | |
37de36c6 KB |
698 | #ifdef DYNAMIC_SYSCALLS |
699 | load_syscalls (pi); | |
700 | #endif | |
701 | ||
1d5e0602 KB |
702 | pi->saved_entryset = sysset_t_alloc (pi); |
703 | pi->saved_exitset = sysset_t_alloc (pi); | |
704 | ||
c3f6f71d JM |
705 | /* Chain into list. */ |
706 | if (tid == 0) | |
707 | { | |
708 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
709 | pi->next = procinfo_list; | |
710 | procinfo_list = pi; | |
711 | } | |
712 | else | |
713 | { | |
714 | #ifdef NEW_PROC_API | |
715 | sprintf (pi->pathname, "/proc/%05d/lwp/%d", pid, tid); | |
716 | #else | |
717 | sprintf (pi->pathname, MAIN_PROC_NAME_FMT, pid); | |
718 | #endif | |
719 | pi->next = parent->thread_list; | |
720 | parent->thread_list = pi; | |
721 | } | |
722 | return pi; | |
723 | } | |
c906108c | 724 | |
77382aee | 725 | /* Close all file descriptors associated with the procinfo. */ |
c906108c | 726 | |
c3f6f71d | 727 | static void |
fba45db2 | 728 | close_procinfo_files (procinfo *pi) |
c3f6f71d JM |
729 | { |
730 | if (pi->ctl_fd > 0) | |
731 | close (pi->ctl_fd); | |
732 | #ifdef NEW_PROC_API | |
733 | if (pi->as_fd > 0) | |
734 | close (pi->as_fd); | |
735 | if (pi->status_fd > 0) | |
736 | close (pi->status_fd); | |
737 | #endif | |
738 | pi->ctl_fd = pi->as_fd = pi->status_fd = 0; | |
739 | } | |
c906108c | 740 | |
77382aee | 741 | /* Destructor function. Close, unlink and deallocate the object. */ |
c906108c | 742 | |
c3f6f71d | 743 | static void |
fba45db2 | 744 | destroy_one_procinfo (procinfo **list, procinfo *pi) |
c3f6f71d JM |
745 | { |
746 | procinfo *ptr; | |
747 | ||
77382aee | 748 | /* Step one: unlink the procinfo from its list. */ |
c3f6f71d JM |
749 | if (pi == *list) |
750 | *list = pi->next; | |
19958708 | 751 | else |
c3f6f71d JM |
752 | for (ptr = *list; ptr; ptr = ptr->next) |
753 | if (ptr->next == pi) | |
754 | { | |
755 | ptr->next = pi->next; | |
756 | break; | |
757 | } | |
7a292a7a | 758 | |
77382aee | 759 | /* Step two: close any open file descriptors. */ |
c3f6f71d | 760 | close_procinfo_files (pi); |
7a292a7a | 761 | |
77382aee | 762 | /* Step three: free the memory. */ |
37de36c6 KB |
763 | #ifdef DYNAMIC_SYSCALLS |
764 | free_syscalls (pi); | |
765 | #endif | |
1d5e0602 KB |
766 | xfree (pi->saved_entryset); |
767 | xfree (pi->saved_exitset); | |
b8c9b27d | 768 | xfree (pi); |
c3f6f71d | 769 | } |
c906108c | 770 | |
c3f6f71d | 771 | static void |
fba45db2 | 772 | destroy_procinfo (procinfo *pi) |
c3f6f71d JM |
773 | { |
774 | procinfo *tmp; | |
c906108c | 775 | |
0df8b418 | 776 | if (pi->tid != 0) /* Destroy a thread procinfo. */ |
c3f6f71d | 777 | { |
0df8b418 | 778 | tmp = find_procinfo (pi->pid, 0); /* Find the parent process. */ |
c3f6f71d JM |
779 | destroy_one_procinfo (&tmp->thread_list, pi); |
780 | } | |
0df8b418 | 781 | else /* Destroy a process procinfo and all its threads. */ |
c3f6f71d JM |
782 | { |
783 | /* First destroy the children, if any; */ | |
784 | while (pi->thread_list != NULL) | |
785 | destroy_one_procinfo (&pi->thread_list, pi->thread_list); | |
786 | /* Then destroy the parent. Genocide!!! */ | |
787 | destroy_one_procinfo (&procinfo_list, pi); | |
788 | } | |
789 | } | |
c906108c | 790 | |
004527cb AC |
791 | static void |
792 | do_destroy_procinfo_cleanup (void *pi) | |
793 | { | |
794 | destroy_procinfo (pi); | |
795 | } | |
796 | ||
c3f6f71d | 797 | enum { NOKILL, KILL }; |
c906108c | 798 | |
77382aee PA |
799 | /* To be called on a non_recoverable error for a procinfo. Prints |
800 | error messages, optionally sends a SIGKILL to the process, then | |
801 | destroys the data structure. */ | |
c906108c | 802 | |
c3f6f71d | 803 | static void |
fba45db2 | 804 | dead_procinfo (procinfo *pi, char *msg, int kill_p) |
c3f6f71d JM |
805 | { |
806 | char procfile[80]; | |
c906108c | 807 | |
c3f6f71d JM |
808 | if (pi->pathname) |
809 | { | |
810 | print_sys_errmsg (pi->pathname, errno); | |
811 | } | |
812 | else | |
813 | { | |
814 | sprintf (procfile, "process %d", pi->pid); | |
815 | print_sys_errmsg (procfile, errno); | |
816 | } | |
817 | if (kill_p == KILL) | |
818 | kill (pi->pid, SIGKILL); | |
c906108c | 819 | |
c3f6f71d | 820 | destroy_procinfo (pi); |
0b62613e | 821 | error ("%s", msg); |
c3f6f71d | 822 | } |
c906108c | 823 | |
77382aee PA |
824 | /* Returns the (complete) size of a sysset_t struct. Normally, this |
825 | is just sizeof (sysset_t), but in the case of Monterey/64, the | |
826 | actual size of sysset_t isn't known until runtime. */ | |
37de36c6 KB |
827 | |
828 | static int | |
829 | sysset_t_size (procinfo * pi) | |
830 | { | |
831 | #ifndef DYNAMIC_SYSCALLS | |
832 | return sizeof (sysset_t); | |
833 | #else | |
834 | return sizeof (sysset_t) - sizeof (uint64_t) | |
835 | + sizeof (uint64_t) * ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) | |
836 | / (8 * sizeof (uint64_t))); | |
837 | #endif | |
838 | } | |
839 | ||
77382aee | 840 | /* Allocate and (partially) initialize a sysset_t struct. */ |
37de36c6 KB |
841 | |
842 | static sysset_t * | |
843 | sysset_t_alloc (procinfo * pi) | |
844 | { | |
845 | sysset_t *ret; | |
846 | int size = sysset_t_size (pi); | |
f4a14ae6 | 847 | |
37de36c6 KB |
848 | ret = xmalloc (size); |
849 | #ifdef DYNAMIC_SYSCALLS | |
77382aee PA |
850 | ret->pr_size = ((pi->num_syscalls + (8 * sizeof (uint64_t) - 1)) |
851 | / (8 * sizeof (uint64_t))); | |
37de36c6 KB |
852 | #endif |
853 | return ret; | |
854 | } | |
855 | ||
856 | #ifdef DYNAMIC_SYSCALLS | |
857 | ||
77382aee | 858 | /* Extract syscall numbers and names from /proc/<pid>/sysent. Initialize |
37de36c6 KB |
859 | pi->num_syscalls with the number of syscalls and pi->syscall_names |
860 | with the names. (Certain numbers may be skipped in which case the | |
0df8b418 | 861 | names for these numbers will be left as NULL.) */ |
37de36c6 KB |
862 | |
863 | #define MAX_SYSCALL_NAME_LENGTH 256 | |
864 | #define MAX_SYSCALLS 65536 | |
865 | ||
866 | static void | |
867 | load_syscalls (procinfo *pi) | |
868 | { | |
869 | char pathname[MAX_PROC_NAME_SIZE]; | |
870 | int sysent_fd; | |
871 | prsysent_t header; | |
872 | prsyscall_t *syscalls; | |
873 | int i, size, maxcall; | |
e28cade7 | 874 | struct cleanup *cleanups; |
37de36c6 KB |
875 | |
876 | pi->num_syscalls = 0; | |
877 | pi->syscall_names = 0; | |
878 | ||
77382aee | 879 | /* Open the file descriptor for the sysent file. */ |
37de36c6 | 880 | sprintf (pathname, "/proc/%d/sysent", pi->pid); |
4d1bcd09 | 881 | sysent_fd = open_with_retry (pathname, O_RDONLY); |
37de36c6 KB |
882 | if (sysent_fd < 0) |
883 | { | |
8a3fe4f8 | 884 | error (_("load_syscalls: Can't open /proc/%d/sysent"), pi->pid); |
37de36c6 | 885 | } |
e28cade7 | 886 | cleanups = make_cleanup_close (sysent_fd); |
37de36c6 KB |
887 | |
888 | size = sizeof header - sizeof (prsyscall_t); | |
889 | if (read (sysent_fd, &header, size) != size) | |
890 | { | |
8a3fe4f8 | 891 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
892 | } |
893 | ||
894 | if (header.pr_nsyscalls == 0) | |
895 | { | |
3e43a32a MS |
896 | error (_("load_syscalls: /proc/%d/sysent contains no syscalls!"), |
897 | pi->pid); | |
37de36c6 KB |
898 | } |
899 | ||
900 | size = header.pr_nsyscalls * sizeof (prsyscall_t); | |
901 | syscalls = xmalloc (size); | |
e28cade7 | 902 | make_cleanup (free_current_contents, &syscalls); |
37de36c6 KB |
903 | |
904 | if (read (sysent_fd, syscalls, size) != size) | |
e28cade7 | 905 | error (_("load_syscalls: Error reading /proc/%d/sysent"), pi->pid); |
37de36c6 KB |
906 | |
907 | /* Find maximum syscall number. This may not be the same as | |
908 | pr_nsyscalls since that value refers to the number of entries | |
909 | in the table. (Also, the docs indicate that some system | |
0df8b418 | 910 | call numbers may be skipped.) */ |
37de36c6 KB |
911 | |
912 | maxcall = syscalls[0].pr_number; | |
913 | ||
914 | for (i = 1; i < header.pr_nsyscalls; i++) | |
915 | if (syscalls[i].pr_number > maxcall | |
77382aee | 916 | && syscalls[i].pr_nameoff > 0 |
37de36c6 KB |
917 | && syscalls[i].pr_number < MAX_SYSCALLS) |
918 | maxcall = syscalls[i].pr_number; | |
919 | ||
920 | pi->num_syscalls = maxcall+1; | |
8d749320 | 921 | pi->syscall_names = XNEWVEC (char *, pi->num_syscalls); |
37de36c6 KB |
922 | |
923 | for (i = 0; i < pi->num_syscalls; i++) | |
924 | pi->syscall_names[i] = NULL; | |
925 | ||
77382aee | 926 | /* Read the syscall names in. */ |
37de36c6 KB |
927 | for (i = 0; i < header.pr_nsyscalls; i++) |
928 | { | |
929 | char namebuf[MAX_SYSCALL_NAME_LENGTH]; | |
930 | int nread; | |
931 | int callnum; | |
932 | ||
933 | if (syscalls[i].pr_number >= MAX_SYSCALLS | |
77382aee | 934 | || syscalls[i].pr_number < 0 |
37de36c6 KB |
935 | || syscalls[i].pr_nameoff <= 0 |
936 | || (lseek (sysent_fd, (off_t) syscalls[i].pr_nameoff, SEEK_SET) | |
77382aee | 937 | != (off_t) syscalls[i].pr_nameoff)) |
37de36c6 KB |
938 | continue; |
939 | ||
940 | nread = read (sysent_fd, namebuf, sizeof namebuf); | |
941 | if (nread <= 0) | |
942 | continue; | |
943 | ||
944 | callnum = syscalls[i].pr_number; | |
945 | ||
946 | if (pi->syscall_names[callnum] != NULL) | |
947 | { | |
0df8b418 | 948 | /* FIXME: Generate warning. */ |
37de36c6 KB |
949 | continue; |
950 | } | |
951 | ||
952 | namebuf[nread-1] = '\0'; | |
953 | size = strlen (namebuf) + 1; | |
954 | pi->syscall_names[callnum] = xmalloc (size); | |
955 | strncpy (pi->syscall_names[callnum], namebuf, size-1); | |
956 | pi->syscall_names[callnum][size-1] = '\0'; | |
957 | } | |
19958708 | 958 | |
e28cade7 | 959 | do_cleanups (cleanups); |
37de36c6 KB |
960 | } |
961 | ||
77382aee | 962 | /* Free the space allocated for the syscall names from the procinfo |
37de36c6 KB |
963 | structure. */ |
964 | ||
965 | static void | |
966 | free_syscalls (procinfo *pi) | |
967 | { | |
968 | if (pi->syscall_names) | |
969 | { | |
970 | int i; | |
971 | ||
972 | for (i = 0; i < pi->num_syscalls; i++) | |
973 | if (pi->syscall_names[i] != NULL) | |
974 | xfree (pi->syscall_names[i]); | |
975 | ||
976 | xfree (pi->syscall_names); | |
977 | pi->syscall_names = 0; | |
978 | } | |
979 | } | |
980 | ||
77382aee | 981 | /* Given a name, look up (and return) the corresponding syscall number. |
37de36c6 | 982 | If no match is found, return -1. */ |
19958708 | 983 | |
37de36c6 KB |
984 | static int |
985 | find_syscall (procinfo *pi, char *name) | |
986 | { | |
987 | int i; | |
f4a14ae6 | 988 | |
37de36c6 KB |
989 | for (i = 0; i < pi->num_syscalls; i++) |
990 | { | |
991 | if (pi->syscall_names[i] && strcmp (name, pi->syscall_names[i]) == 0) | |
992 | return i; | |
993 | } | |
994 | return -1; | |
995 | } | |
996 | #endif | |
997 | ||
c3f6f71d | 998 | /* =================== END, STRUCT PROCINFO "MODULE" =================== */ |
c906108c | 999 | |
c3f6f71d | 1000 | /* =================== /proc "MODULE" =================== */ |
c906108c | 1001 | |
77382aee PA |
1002 | /* This "module" is the interface layer between the /proc system API |
1003 | and the gdb target vector functions. This layer consists of access | |
1004 | functions that encapsulate each of the basic operations that we | |
1005 | need to use from the /proc API. | |
1006 | ||
1007 | The main motivation for this layer is to hide the fact that there | |
1008 | are two very different implementations of the /proc API. Rather | |
1009 | than have a bunch of #ifdefs all thru the gdb target vector | |
1010 | functions, we do our best to hide them all in here. */ | |
c906108c | 1011 | |
d3581e61 JB |
1012 | static long proc_flags (procinfo * pi); |
1013 | static int proc_why (procinfo * pi); | |
1014 | static int proc_what (procinfo * pi); | |
1015 | static int proc_set_current_signal (procinfo * pi, int signo); | |
1016 | static int proc_get_current_thread (procinfo * pi); | |
1017 | static int proc_iterate_over_threads | |
1018 | (procinfo * pi, | |
1019 | int (*func) (procinfo *, procinfo *, void *), | |
1020 | void *ptr); | |
1021 | ||
1022 | static void | |
fba45db2 | 1023 | proc_warn (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1024 | { |
1025 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1026 | print_sys_errmsg (errmsg, errno); | |
1027 | } | |
c906108c | 1028 | |
d3581e61 | 1029 | static void |
fba45db2 | 1030 | proc_error (procinfo *pi, char *func, int line) |
c3f6f71d JM |
1031 | { |
1032 | sprintf (errmsg, "procfs: %s line %d, %s", func, line, pi->pathname); | |
1033 | perror_with_name (errmsg); | |
1034 | } | |
c906108c | 1035 | |
77382aee PA |
1036 | /* Updates the status struct in the procinfo. There is a 'valid' |
1037 | flag, to let other functions know when this function needs to be | |
1038 | called (so the status is only read when it is needed). The status | |
1039 | file descriptor is also only opened when it is needed. Returns | |
1040 | non-zero for success, zero for failure. */ | |
c906108c | 1041 | |
d3581e61 | 1042 | static int |
fba45db2 | 1043 | proc_get_status (procinfo *pi) |
c3f6f71d | 1044 | { |
0df8b418 | 1045 | /* Status file descriptor is opened "lazily". */ |
c3f6f71d JM |
1046 | if (pi->status_fd == 0 && |
1047 | open_procinfo_files (pi, FD_STATUS) == 0) | |
1048 | { | |
1049 | pi->status_valid = 0; | |
1050 | return 0; | |
1051 | } | |
c906108c | 1052 | |
c3f6f71d JM |
1053 | #ifdef NEW_PROC_API |
1054 | if (lseek (pi->status_fd, 0, SEEK_SET) < 0) | |
1055 | pi->status_valid = 0; /* fail */ | |
1056 | else | |
1057 | { | |
19958708 | 1058 | /* Sigh... I have to read a different data structure, |
0df8b418 | 1059 | depending on whether this is a main process or an LWP. */ |
c3f6f71d | 1060 | if (pi->tid) |
19958708 RM |
1061 | pi->status_valid = (read (pi->status_fd, |
1062 | (char *) &pi->prstatus.pr_lwp, | |
c3f6f71d JM |
1063 | sizeof (lwpstatus_t)) |
1064 | == sizeof (lwpstatus_t)); | |
1065 | else | |
1066 | { | |
19958708 | 1067 | pi->status_valid = (read (pi->status_fd, |
c3f6f71d JM |
1068 | (char *) &pi->prstatus, |
1069 | sizeof (gdb_prstatus_t)) | |
1070 | == sizeof (gdb_prstatus_t)); | |
c3f6f71d JM |
1071 | } |
1072 | } | |
1073 | #else /* ioctl method */ | |
1074 | #ifdef PIOCTSTATUS /* osf */ | |
1075 | if (pi->tid == 0) /* main process */ | |
1076 | { | |
0df8b418 | 1077 | /* Just read the danged status. Now isn't that simple? */ |
19958708 | 1078 | pi->status_valid = |
c3f6f71d JM |
1079 | (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1080 | } | |
1081 | else | |
1082 | { | |
1083 | int win; | |
1084 | struct { | |
1085 | long pr_count; | |
1086 | tid_t pr_error_thread; | |
1087 | struct prstatus status; | |
1088 | } thread_status; | |
1089 | ||
1090 | thread_status.pr_count = 1; | |
1091 | thread_status.status.pr_tid = pi->tid; | |
1092 | win = (ioctl (pi->status_fd, PIOCTSTATUS, &thread_status) >= 0); | |
1093 | if (win) | |
1094 | { | |
19958708 | 1095 | memcpy (&pi->prstatus, &thread_status.status, |
c3f6f71d JM |
1096 | sizeof (pi->prstatus)); |
1097 | pi->status_valid = 1; | |
1098 | } | |
1099 | } | |
1100 | #else | |
77382aee | 1101 | /* Just read the danged status. Now isn't that simple? */ |
c3f6f71d JM |
1102 | pi->status_valid = (ioctl (pi->status_fd, PIOCSTATUS, &pi->prstatus) >= 0); |
1103 | #endif | |
1104 | #endif | |
c906108c | 1105 | |
c3f6f71d JM |
1106 | if (pi->status_valid) |
1107 | { | |
19958708 | 1108 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1109 | proc_why (pi), |
19958708 | 1110 | proc_what (pi), |
c3f6f71d JM |
1111 | proc_get_current_thread (pi)); |
1112 | } | |
c906108c | 1113 | |
77382aee | 1114 | /* The status struct includes general regs, so mark them valid too. */ |
c3f6f71d JM |
1115 | pi->gregs_valid = pi->status_valid; |
1116 | #ifdef NEW_PROC_API | |
77382aee PA |
1117 | /* In the read/write multiple-fd model, the status struct includes |
1118 | the fp regs too, so mark them valid too. */ | |
c3f6f71d JM |
1119 | pi->fpregs_valid = pi->status_valid; |
1120 | #endif | |
77382aee | 1121 | return pi->status_valid; /* True if success, false if failure. */ |
c3f6f71d | 1122 | } |
c906108c | 1123 | |
77382aee | 1124 | /* Returns the process flags (pr_flags field). */ |
c3f6f71d | 1125 | |
d3581e61 | 1126 | static long |
fba45db2 | 1127 | proc_flags (procinfo *pi) |
c3f6f71d JM |
1128 | { |
1129 | if (!pi->status_valid) | |
1130 | if (!proc_get_status (pi)) | |
0df8b418 | 1131 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1132 | |
c3f6f71d JM |
1133 | #ifdef NEW_PROC_API |
1134 | return pi->prstatus.pr_lwp.pr_flags; | |
1135 | #else | |
1136 | return pi->prstatus.pr_flags; | |
1137 | #endif | |
1138 | } | |
c906108c | 1139 | |
77382aee | 1140 | /* Returns the pr_why field (why the process stopped). */ |
c906108c | 1141 | |
d3581e61 | 1142 | static int |
fba45db2 | 1143 | proc_why (procinfo *pi) |
c3f6f71d JM |
1144 | { |
1145 | if (!pi->status_valid) | |
1146 | if (!proc_get_status (pi)) | |
0df8b418 | 1147 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1148 | |
c3f6f71d JM |
1149 | #ifdef NEW_PROC_API |
1150 | return pi->prstatus.pr_lwp.pr_why; | |
1151 | #else | |
1152 | return pi->prstatus.pr_why; | |
1153 | #endif | |
1154 | } | |
c906108c | 1155 | |
77382aee | 1156 | /* Returns the pr_what field (details of why the process stopped). */ |
c906108c | 1157 | |
d3581e61 | 1158 | static int |
fba45db2 | 1159 | proc_what (procinfo *pi) |
c3f6f71d JM |
1160 | { |
1161 | if (!pi->status_valid) | |
1162 | if (!proc_get_status (pi)) | |
0df8b418 | 1163 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1164 | |
c3f6f71d JM |
1165 | #ifdef NEW_PROC_API |
1166 | return pi->prstatus.pr_lwp.pr_what; | |
1167 | #else | |
1168 | return pi->prstatus.pr_what; | |
c906108c | 1169 | #endif |
c3f6f71d | 1170 | } |
c906108c | 1171 | |
77382aee PA |
1172 | /* This function is only called when PI is stopped by a watchpoint. |
1173 | Assuming the OS supports it, write to *ADDR the data address which | |
1174 | triggered it and return 1. Return 0 if it is not possible to know | |
1175 | the address. */ | |
bf701c2c PM |
1176 | |
1177 | static int | |
1178 | proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr) | |
1179 | { | |
1180 | if (!pi->status_valid) | |
1181 | if (!proc_get_status (pi)) | |
1182 | return 0; | |
1183 | ||
1184 | #ifdef NEW_PROC_API | |
f5656ead TT |
1185 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (), |
1186 | builtin_type (target_gdbarch ())->builtin_data_ptr, | |
bf701c2c PM |
1187 | (gdb_byte *) &pi->prstatus.pr_lwp.pr_info.si_addr); |
1188 | #else | |
f5656ead TT |
1189 | *addr = (CORE_ADDR) gdbarch_pointer_to_address (target_gdbarch (), |
1190 | builtin_type (target_gdbarch ())->builtin_data_ptr, | |
bf701c2c PM |
1191 | (gdb_byte *) &pi->prstatus.pr_info.si_addr); |
1192 | #endif | |
1193 | return 1; | |
1194 | } | |
1195 | ||
c3f6f71d | 1196 | #ifndef PIOCSSPCACT /* The following is not supported on OSF. */ |
77382aee PA |
1197 | |
1198 | /* Returns the pr_nsysarg field (number of args to the current | |
1199 | syscall). */ | |
c3f6f71d | 1200 | |
d3581e61 | 1201 | static int |
fba45db2 | 1202 | proc_nsysarg (procinfo *pi) |
c3f6f71d JM |
1203 | { |
1204 | if (!pi->status_valid) | |
1205 | if (!proc_get_status (pi)) | |
1206 | return 0; | |
19958708 | 1207 | |
c3f6f71d JM |
1208 | #ifdef NEW_PROC_API |
1209 | return pi->prstatus.pr_lwp.pr_nsysarg; | |
1210 | #else | |
1211 | return pi->prstatus.pr_nsysarg; | |
c906108c | 1212 | #endif |
c3f6f71d | 1213 | } |
c906108c | 1214 | |
77382aee PA |
1215 | /* Returns the pr_sysarg field (pointer to the arguments of current |
1216 | syscall). */ | |
c906108c | 1217 | |
d3581e61 | 1218 | static long * |
fba45db2 | 1219 | proc_sysargs (procinfo *pi) |
c3f6f71d JM |
1220 | { |
1221 | if (!pi->status_valid) | |
1222 | if (!proc_get_status (pi)) | |
1223 | return NULL; | |
19958708 | 1224 | |
c3f6f71d JM |
1225 | #ifdef NEW_PROC_API |
1226 | return (long *) &pi->prstatus.pr_lwp.pr_sysarg; | |
1227 | #else | |
1228 | return (long *) &pi->prstatus.pr_sysarg; | |
1229 | #endif | |
1230 | } | |
c3f6f71d | 1231 | #endif /* PIOCSSPCACT */ |
c906108c | 1232 | |
d3581e61 | 1233 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG |
77382aee | 1234 | /* Returns the pr_cursig field (current signal). */ |
c906108c | 1235 | |
d3581e61 | 1236 | static long |
c3f6f71d JM |
1237 | proc_cursig (struct procinfo *pi) |
1238 | { | |
1239 | if (!pi->status_valid) | |
1240 | if (!proc_get_status (pi)) | |
0df8b418 | 1241 | return 0; /* FIXME: not a good failure value (but what is?) */ |
c906108c | 1242 | |
c3f6f71d JM |
1243 | #ifdef NEW_PROC_API |
1244 | return pi->prstatus.pr_lwp.pr_cursig; | |
1245 | #else | |
1246 | return pi->prstatus.pr_cursig; | |
1247 | #endif | |
1248 | } | |
d3581e61 | 1249 | #endif /* PROCFS_DONT_PIOCSSIG_CURSIG */ |
c906108c | 1250 | |
77382aee PA |
1251 | /* === I appologize for the messiness of this function. |
1252 | === This is an area where the different versions of | |
1253 | === /proc are more inconsistent than usual. | |
1254 | ||
1255 | Set or reset any of the following process flags: | |
1256 | PR_FORK -- forked child will inherit trace flags | |
1257 | PR_RLC -- traced process runs when last /proc file closed. | |
1258 | PR_KLC -- traced process is killed when last /proc file closed. | |
1259 | PR_ASYNC -- LWP's get to run/stop independently. | |
1260 | ||
1261 | There are three methods for doing this function: | |
1262 | 1) Newest: read/write [PCSET/PCRESET/PCUNSET] | |
1263 | [Sol6, Sol7, UW] | |
1264 | 2) Middle: PIOCSET/PIOCRESET | |
1265 | [Irix, Sol5] | |
1266 | 3) Oldest: PIOCSFORK/PIOCRFORK/PIOCSRLC/PIOCRRLC | |
1267 | [OSF, Sol5] | |
1268 | ||
1269 | Note: Irix does not define PR_ASYNC. | |
1270 | Note: OSF does not define PR_KLC. | |
1271 | Note: OSF is the only one that can ONLY use the oldest method. | |
1272 | ||
1273 | Arguments: | |
1274 | pi -- the procinfo | |
1275 | flag -- one of PR_FORK, PR_RLC, or PR_ASYNC | |
1276 | mode -- 1 for set, 0 for reset. | |
1277 | ||
1278 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1279 | |
c3f6f71d | 1280 | enum { FLAG_RESET, FLAG_SET }; |
c906108c | 1281 | |
c3f6f71d | 1282 | static int |
fba45db2 | 1283 | proc_modify_flag (procinfo *pi, long flag, long mode) |
c3f6f71d JM |
1284 | { |
1285 | long win = 0; /* default to fail */ | |
1286 | ||
77382aee PA |
1287 | /* These operations affect the process as a whole, and applying them |
1288 | to an individual LWP has the same meaning as applying them to the | |
1289 | main process. Therefore, if we're ever called with a pointer to | |
1290 | an LWP's procinfo, let's substitute the process's procinfo and | |
1291 | avoid opening the LWP's file descriptor unnecessarily. */ | |
c3f6f71d JM |
1292 | |
1293 | if (pi->pid != 0) | |
1294 | pi = find_procinfo_or_die (pi->pid, 0); | |
1295 | ||
05b4bd79 | 1296 | #ifdef NEW_PROC_API /* Newest method: Newer Solarii. */ |
19958708 | 1297 | /* First normalize the PCUNSET/PCRESET command opcode |
c3f6f71d JM |
1298 | (which for no obvious reason has a different definition |
1299 | from one operating system to the next...) */ | |
1300 | #ifdef PCUNSET | |
1301 | #define GDBRESET PCUNSET | |
37de36c6 | 1302 | #else |
c3f6f71d JM |
1303 | #ifdef PCRESET |
1304 | #define GDBRESET PCRESET | |
37de36c6 | 1305 | #endif |
c906108c | 1306 | #endif |
c3f6f71d | 1307 | { |
37de36c6 | 1308 | procfs_ctl_t arg[2]; |
c906108c | 1309 | |
0df8b418 | 1310 | if (mode == FLAG_SET) /* Set the flag (RLC, FORK, or ASYNC). */ |
c3f6f71d | 1311 | arg[0] = PCSET; |
0df8b418 | 1312 | else /* Reset the flag. */ |
c3f6f71d | 1313 | arg[0] = GDBRESET; |
c5aa993b | 1314 | |
c3f6f71d JM |
1315 | arg[1] = flag; |
1316 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
1317 | } | |
1318 | #else | |
1319 | #ifdef PIOCSET /* Irix/Sol5 method */ | |
0df8b418 | 1320 | if (mode == FLAG_SET) /* Set the flag (hopefully RLC, FORK, or ASYNC). */ |
c3f6f71d JM |
1321 | { |
1322 | win = (ioctl (pi->ctl_fd, PIOCSET, &flag) >= 0); | |
1323 | } | |
0df8b418 | 1324 | else /* Reset the flag. */ |
c3f6f71d JM |
1325 | { |
1326 | win = (ioctl (pi->ctl_fd, PIOCRESET, &flag) >= 0); | |
1327 | } | |
c906108c | 1328 | |
c3f6f71d JM |
1329 | #else |
1330 | #ifdef PIOCSRLC /* Oldest method: OSF */ | |
1331 | switch (flag) { | |
1332 | case PR_RLC: | |
1333 | if (mode == FLAG_SET) /* Set run-on-last-close */ | |
1334 | { | |
1335 | win = (ioctl (pi->ctl_fd, PIOCSRLC, NULL) >= 0); | |
1336 | } | |
1337 | else /* Clear run-on-last-close */ | |
1338 | { | |
1339 | win = (ioctl (pi->ctl_fd, PIOCRRLC, NULL) >= 0); | |
1340 | } | |
1341 | break; | |
1342 | case PR_FORK: | |
1343 | if (mode == FLAG_SET) /* Set inherit-on-fork */ | |
1344 | { | |
1345 | win = (ioctl (pi->ctl_fd, PIOCSFORK, NULL) >= 0); | |
1346 | } | |
1347 | else /* Clear inherit-on-fork */ | |
1348 | { | |
1349 | win = (ioctl (pi->ctl_fd, PIOCRFORK, NULL) >= 0); | |
1350 | } | |
1351 | break; | |
1352 | default: | |
0df8b418 | 1353 | win = 0; /* Fail -- unknown flag (can't do PR_ASYNC). */ |
c3f6f71d JM |
1354 | break; |
1355 | } | |
1356 | #endif | |
1357 | #endif | |
1358 | #endif | |
1359 | #undef GDBRESET | |
77382aee PA |
1360 | /* The above operation renders the procinfo's cached pstatus |
1361 | obsolete. */ | |
c3f6f71d | 1362 | pi->status_valid = 0; |
c906108c | 1363 | |
c3f6f71d | 1364 | if (!win) |
8a3fe4f8 | 1365 | warning (_("procfs: modify_flag failed to turn %s %s"), |
c3f6f71d JM |
1366 | flag == PR_FORK ? "PR_FORK" : |
1367 | flag == PR_RLC ? "PR_RLC" : | |
1368 | #ifdef PR_ASYNC | |
1369 | flag == PR_ASYNC ? "PR_ASYNC" : | |
0d06e24b JM |
1370 | #endif |
1371 | #ifdef PR_KLC | |
1372 | flag == PR_KLC ? "PR_KLC" : | |
c3f6f71d JM |
1373 | #endif |
1374 | "<unknown flag>", | |
1375 | mode == FLAG_RESET ? "off" : "on"); | |
c906108c | 1376 | |
c3f6f71d JM |
1377 | return win; |
1378 | } | |
c906108c | 1379 | |
77382aee PA |
1380 | /* Set the run_on_last_close flag. Process with all threads will |
1381 | become runnable when debugger closes all /proc fds. Returns | |
1382 | non-zero for success, zero for failure. */ | |
c906108c | 1383 | |
d3581e61 | 1384 | static int |
fba45db2 | 1385 | proc_set_run_on_last_close (procinfo *pi) |
c906108c | 1386 | { |
c3f6f71d JM |
1387 | return proc_modify_flag (pi, PR_RLC, FLAG_SET); |
1388 | } | |
c906108c | 1389 | |
77382aee PA |
1390 | /* Reset the run_on_last_close flag. The process will NOT become |
1391 | runnable when debugger closes its file handles. Returns non-zero | |
1392 | for success, zero for failure. */ | |
c906108c | 1393 | |
d3581e61 | 1394 | static int |
fba45db2 | 1395 | proc_unset_run_on_last_close (procinfo *pi) |
c3f6f71d JM |
1396 | { |
1397 | return proc_modify_flag (pi, PR_RLC, FLAG_RESET); | |
c906108c SS |
1398 | } |
1399 | ||
77382aee PA |
1400 | /* Reset inherit_on_fork flag. If the process forks a child while we |
1401 | are registered for events in the parent, then we will NOT recieve | |
1402 | events from the child. Returns non-zero for success, zero for | |
1403 | failure. */ | |
c906108c | 1404 | |
d3581e61 | 1405 | static int |
fba45db2 | 1406 | proc_unset_inherit_on_fork (procinfo *pi) |
c3f6f71d JM |
1407 | { |
1408 | return proc_modify_flag (pi, PR_FORK, FLAG_RESET); | |
1409 | } | |
c906108c | 1410 | |
c3f6f71d | 1411 | #ifdef PR_ASYNC |
77382aee PA |
1412 | /* Set PR_ASYNC flag. If one LWP stops because of a debug event |
1413 | (signal etc.), the remaining LWPs will continue to run. Returns | |
1414 | non-zero for success, zero for failure. */ | |
c906108c | 1415 | |
d3581e61 | 1416 | static int |
fba45db2 | 1417 | proc_set_async (procinfo *pi) |
c3f6f71d JM |
1418 | { |
1419 | return proc_modify_flag (pi, PR_ASYNC, FLAG_SET); | |
1420 | } | |
c906108c | 1421 | |
77382aee PA |
1422 | /* Reset PR_ASYNC flag. If one LWP stops because of a debug event |
1423 | (signal etc.), then all other LWPs will stop as well. Returns | |
1424 | non-zero for success, zero for failure. */ | |
c906108c | 1425 | |
d3581e61 | 1426 | static int |
fba45db2 | 1427 | proc_unset_async (procinfo *pi) |
c3f6f71d JM |
1428 | { |
1429 | return proc_modify_flag (pi, PR_ASYNC, FLAG_RESET); | |
1430 | } | |
1431 | #endif /* PR_ASYNC */ | |
c906108c | 1432 | |
77382aee PA |
1433 | /* Request the process/LWP to stop. Does not wait. Returns non-zero |
1434 | for success, zero for failure. */ | |
c906108c | 1435 | |
d3581e61 | 1436 | static int |
fba45db2 | 1437 | proc_stop_process (procinfo *pi) |
c3f6f71d JM |
1438 | { |
1439 | int win; | |
c906108c | 1440 | |
77382aee PA |
1441 | /* We might conceivably apply this operation to an LWP, and the |
1442 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 1443 | |
c3f6f71d JM |
1444 | if (pi->ctl_fd == 0 && |
1445 | open_procinfo_files (pi, FD_CTL) == 0) | |
1446 | return 0; | |
1447 | else | |
1448 | { | |
1449 | #ifdef NEW_PROC_API | |
37de36c6 | 1450 | procfs_ctl_t cmd = PCSTOP; |
f4a14ae6 | 1451 | |
c3f6f71d JM |
1452 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1453 | #else /* ioctl method */ | |
1454 | win = (ioctl (pi->ctl_fd, PIOCSTOP, &pi->prstatus) >= 0); | |
1455 | /* Note: the call also reads the prstatus. */ | |
1456 | if (win) | |
1457 | { | |
1458 | pi->status_valid = 1; | |
19958708 | 1459 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1460 | proc_why (pi), |
19958708 | 1461 | proc_what (pi), |
c3f6f71d JM |
1462 | proc_get_current_thread (pi)); |
1463 | } | |
1464 | #endif | |
1465 | } | |
c906108c | 1466 | |
c3f6f71d JM |
1467 | return win; |
1468 | } | |
c5aa993b | 1469 | |
77382aee PA |
1470 | /* Wait for the process or LWP to stop (block until it does). Returns |
1471 | non-zero for success, zero for failure. */ | |
c906108c | 1472 | |
d3581e61 | 1473 | static int |
fba45db2 | 1474 | proc_wait_for_stop (procinfo *pi) |
c906108c | 1475 | { |
c3f6f71d JM |
1476 | int win; |
1477 | ||
77382aee PA |
1478 | /* We should never have to apply this operation to any procinfo |
1479 | except the one for the main process. If that ever changes for | |
1480 | any reason, then take out the following clause and replace it | |
1481 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1482 | |
c3f6f71d JM |
1483 | if (pi->tid != 0) |
1484 | pi = find_procinfo_or_die (pi->pid, 0); | |
1485 | ||
1486 | #ifdef NEW_PROC_API | |
1487 | { | |
37de36c6 | 1488 | procfs_ctl_t cmd = PCWSTOP; |
f4a14ae6 | 1489 | |
c3f6f71d JM |
1490 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
1491 | /* We been runnin' and we stopped -- need to update status. */ | |
1492 | pi->status_valid = 0; | |
1493 | } | |
1494 | #else /* ioctl method */ | |
1495 | win = (ioctl (pi->ctl_fd, PIOCWSTOP, &pi->prstatus) >= 0); | |
1496 | /* Above call also refreshes the prstatus. */ | |
1497 | if (win) | |
1498 | { | |
1499 | pi->status_valid = 1; | |
19958708 | 1500 | PROC_PRETTYFPRINT_STATUS (proc_flags (pi), |
c3f6f71d | 1501 | proc_why (pi), |
19958708 | 1502 | proc_what (pi), |
c3f6f71d JM |
1503 | proc_get_current_thread (pi)); |
1504 | } | |
c906108c SS |
1505 | #endif |
1506 | ||
c3f6f71d | 1507 | return win; |
c906108c SS |
1508 | } |
1509 | ||
77382aee PA |
1510 | /* Make the process or LWP runnable. |
1511 | ||
1512 | Options (not all are implemented): | |
1513 | - single-step | |
1514 | - clear current fault | |
1515 | - clear current signal | |
1516 | - abort the current system call | |
1517 | - stop as soon as finished with system call | |
1518 | - (ioctl): set traced signal set | |
1519 | - (ioctl): set held signal set | |
1520 | - (ioctl): set traced fault set | |
1521 | - (ioctl): set start pc (vaddr) | |
1522 | ||
1523 | Always clears the current fault. PI is the process or LWP to | |
1524 | operate on. If STEP is true, set the process or LWP to trap after | |
1525 | one instruction. If SIGNO is zero, clear the current signal if | |
1526 | any; if non-zero, set the current signal to this one. Returns | |
1527 | non-zero for success, zero for failure. */ | |
c3f6f71d | 1528 | |
d3581e61 | 1529 | static int |
fba45db2 | 1530 | proc_run_process (procinfo *pi, int step, int signo) |
c3f6f71d JM |
1531 | { |
1532 | int win; | |
1533 | int runflags; | |
1534 | ||
77382aee PA |
1535 | /* We will probably have to apply this operation to individual |
1536 | threads, so make sure the control file descriptor is open. */ | |
19958708 | 1537 | |
c3f6f71d JM |
1538 | if (pi->ctl_fd == 0 && |
1539 | open_procinfo_files (pi, FD_CTL) == 0) | |
1540 | { | |
1541 | return 0; | |
1542 | } | |
c906108c | 1543 | |
0df8b418 | 1544 | runflags = PRCFAULT; /* Always clear current fault. */ |
c3f6f71d JM |
1545 | if (step) |
1546 | runflags |= PRSTEP; | |
1547 | if (signo == 0) | |
1548 | runflags |= PRCSIG; | |
0df8b418 | 1549 | else if (signo != -1) /* -1 means do nothing W.R.T. signals. */ |
c3f6f71d | 1550 | proc_set_current_signal (pi, signo); |
c5aa993b | 1551 | |
c3f6f71d JM |
1552 | #ifdef NEW_PROC_API |
1553 | { | |
37de36c6 | 1554 | procfs_ctl_t cmd[2]; |
c906108c | 1555 | |
c3f6f71d JM |
1556 | cmd[0] = PCRUN; |
1557 | cmd[1] = runflags; | |
1558 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
1559 | } | |
1560 | #else /* ioctl method */ | |
1561 | { | |
1562 | prrun_t prrun; | |
c906108c | 1563 | |
c3f6f71d JM |
1564 | memset (&prrun, 0, sizeof (prrun)); |
1565 | prrun.pr_flags = runflags; | |
1566 | win = (ioctl (pi->ctl_fd, PIOCRUN, &prrun) >= 0); | |
1567 | } | |
1568 | #endif | |
c906108c | 1569 | |
c3f6f71d JM |
1570 | return win; |
1571 | } | |
c906108c | 1572 | |
77382aee PA |
1573 | /* Register to trace signals in the process or LWP. Returns non-zero |
1574 | for success, zero for failure. */ | |
c906108c | 1575 | |
d3581e61 | 1576 | static int |
37de36c6 | 1577 | proc_set_traced_signals (procinfo *pi, gdb_sigset_t *sigset) |
c906108c | 1578 | { |
c3f6f71d JM |
1579 | int win; |
1580 | ||
77382aee PA |
1581 | /* We should never have to apply this operation to any procinfo |
1582 | except the one for the main process. If that ever changes for | |
1583 | any reason, then take out the following clause and replace it | |
1584 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1585 | |
c3f6f71d JM |
1586 | if (pi->tid != 0) |
1587 | pi = find_procinfo_or_die (pi->pid, 0); | |
1588 | ||
1589 | #ifdef NEW_PROC_API | |
1590 | { | |
1591 | struct { | |
37de36c6 | 1592 | procfs_ctl_t cmd; |
c3f6f71d | 1593 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1594 | char sigset[sizeof (gdb_sigset_t)]; |
c3f6f71d | 1595 | } arg; |
c906108c | 1596 | |
c3f6f71d | 1597 | arg.cmd = PCSTRACE; |
37de36c6 | 1598 | memcpy (&arg.sigset, sigset, sizeof (gdb_sigset_t)); |
c906108c | 1599 | |
c3f6f71d JM |
1600 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1601 | } | |
1602 | #else /* ioctl method */ | |
1603 | win = (ioctl (pi->ctl_fd, PIOCSTRACE, sigset) >= 0); | |
1604 | #endif | |
0df8b418 | 1605 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1606 | pi->status_valid = 0; |
c906108c | 1607 | |
c3f6f71d | 1608 | if (!win) |
8a3fe4f8 | 1609 | warning (_("procfs: set_traced_signals failed")); |
c3f6f71d | 1610 | return win; |
c906108c SS |
1611 | } |
1612 | ||
77382aee PA |
1613 | /* Register to trace hardware faults in the process or LWP. Returns |
1614 | non-zero for success, zero for failure. */ | |
c906108c | 1615 | |
d3581e61 | 1616 | static int |
fba45db2 | 1617 | proc_set_traced_faults (procinfo *pi, fltset_t *fltset) |
c3f6f71d JM |
1618 | { |
1619 | int win; | |
1620 | ||
77382aee PA |
1621 | /* We should never have to apply this operation to any procinfo |
1622 | except the one for the main process. If that ever changes for | |
1623 | any reason, then take out the following clause and replace it | |
1624 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1625 | |
c3f6f71d JM |
1626 | if (pi->tid != 0) |
1627 | pi = find_procinfo_or_die (pi->pid, 0); | |
1628 | ||
1629 | #ifdef NEW_PROC_API | |
1630 | { | |
1631 | struct { | |
37de36c6 | 1632 | procfs_ctl_t cmd; |
c3f6f71d JM |
1633 | /* Use char array to avoid alignment issues. */ |
1634 | char fltset[sizeof (fltset_t)]; | |
1635 | } arg; | |
c906108c | 1636 | |
c3f6f71d JM |
1637 | arg.cmd = PCSFAULT; |
1638 | memcpy (&arg.fltset, fltset, sizeof (fltset_t)); | |
c906108c | 1639 | |
c3f6f71d JM |
1640 | win = (write (pi->ctl_fd, (char *) &arg, sizeof (arg)) == sizeof (arg)); |
1641 | } | |
1642 | #else /* ioctl method */ | |
1643 | win = (ioctl (pi->ctl_fd, PIOCSFAULT, fltset) >= 0); | |
1644 | #endif | |
0df8b418 | 1645 | /* The above operation renders the procinfo's cached pstatus obsolete. */ |
c3f6f71d | 1646 | pi->status_valid = 0; |
c906108c | 1647 | |
c3f6f71d JM |
1648 | return win; |
1649 | } | |
c5aa993b | 1650 | |
77382aee PA |
1651 | /* Register to trace entry to system calls in the process or LWP. |
1652 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1653 | |
d3581e61 | 1654 | static int |
fba45db2 | 1655 | proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset) |
c906108c | 1656 | { |
c3f6f71d JM |
1657 | int win; |
1658 | ||
77382aee PA |
1659 | /* We should never have to apply this operation to any procinfo |
1660 | except the one for the main process. If that ever changes for | |
1661 | any reason, then take out the following clause and replace it | |
1662 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1663 | |
c3f6f71d JM |
1664 | if (pi->tid != 0) |
1665 | pi = find_procinfo_or_die (pi->pid, 0); | |
1666 | ||
1667 | #ifdef NEW_PROC_API | |
1668 | { | |
37de36c6 KB |
1669 | struct gdb_proc_ctl_pcsentry { |
1670 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1671 | /* Use char array to avoid alignment issues. */ |
1672 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1673 | } *argp; |
1674 | int argp_size = sizeof (struct gdb_proc_ctl_pcsentry) | |
77382aee | 1675 | - sizeof (sysset_t) |
37de36c6 | 1676 | + sysset_t_size (pi); |
c3f6f71d | 1677 | |
37de36c6 | 1678 | argp = xmalloc (argp_size); |
c3f6f71d | 1679 | |
37de36c6 KB |
1680 | argp->cmd = PCSENTRY; |
1681 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1682 | ||
1683 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1684 | xfree (argp); | |
c3f6f71d JM |
1685 | } |
1686 | #else /* ioctl method */ | |
1687 | win = (ioctl (pi->ctl_fd, PIOCSENTRY, sysset) >= 0); | |
1688 | #endif | |
77382aee PA |
1689 | /* The above operation renders the procinfo's cached pstatus |
1690 | obsolete. */ | |
c3f6f71d | 1691 | pi->status_valid = 0; |
19958708 | 1692 | |
c3f6f71d | 1693 | return win; |
c906108c SS |
1694 | } |
1695 | ||
77382aee PA |
1696 | /* Register to trace exit from system calls in the process or LWP. |
1697 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1698 | |
d3581e61 | 1699 | static int |
fba45db2 | 1700 | proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset) |
c3f6f71d JM |
1701 | { |
1702 | int win; | |
1703 | ||
77382aee PA |
1704 | /* We should never have to apply this operation to any procinfo |
1705 | except the one for the main process. If that ever changes for | |
1706 | any reason, then take out the following clause and replace it | |
1707 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1708 | |
c3f6f71d JM |
1709 | if (pi->tid != 0) |
1710 | pi = find_procinfo_or_die (pi->pid, 0); | |
1711 | ||
1712 | #ifdef NEW_PROC_API | |
1713 | { | |
37de36c6 KB |
1714 | struct gdb_proc_ctl_pcsexit { |
1715 | procfs_ctl_t cmd; | |
c3f6f71d JM |
1716 | /* Use char array to avoid alignment issues. */ |
1717 | char sysset[sizeof (sysset_t)]; | |
37de36c6 KB |
1718 | } *argp; |
1719 | int argp_size = sizeof (struct gdb_proc_ctl_pcsexit) | |
77382aee | 1720 | - sizeof (sysset_t) |
37de36c6 | 1721 | + sysset_t_size (pi); |
c906108c | 1722 | |
37de36c6 | 1723 | argp = xmalloc (argp_size); |
c906108c | 1724 | |
37de36c6 KB |
1725 | argp->cmd = PCSEXIT; |
1726 | memcpy (&argp->sysset, sysset, sysset_t_size (pi)); | |
1727 | ||
1728 | win = (write (pi->ctl_fd, (char *) argp, argp_size) == argp_size); | |
1729 | xfree (argp); | |
c3f6f71d JM |
1730 | } |
1731 | #else /* ioctl method */ | |
1732 | win = (ioctl (pi->ctl_fd, PIOCSEXIT, sysset) >= 0); | |
1733 | #endif | |
77382aee PA |
1734 | /* The above operation renders the procinfo's cached pstatus |
1735 | obsolete. */ | |
c3f6f71d | 1736 | pi->status_valid = 0; |
c906108c | 1737 | |
c3f6f71d JM |
1738 | return win; |
1739 | } | |
c906108c | 1740 | |
77382aee PA |
1741 | /* Specify the set of blocked / held signals in the process or LWP. |
1742 | Returns non-zero for success, zero for failure. */ | |
c906108c | 1743 | |
d3581e61 | 1744 | static int |
37de36c6 | 1745 | proc_set_held_signals (procinfo *pi, gdb_sigset_t *sighold) |
c906108c | 1746 | { |
c3f6f71d JM |
1747 | int win; |
1748 | ||
77382aee PA |
1749 | /* We should never have to apply this operation to any procinfo |
1750 | except the one for the main process. If that ever changes for | |
1751 | any reason, then take out the following clause and replace it | |
1752 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1753 | |
c3f6f71d JM |
1754 | if (pi->tid != 0) |
1755 | pi = find_procinfo_or_die (pi->pid, 0); | |
1756 | ||
1757 | #ifdef NEW_PROC_API | |
1758 | { | |
1759 | struct { | |
37de36c6 | 1760 | procfs_ctl_t cmd; |
c3f6f71d | 1761 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 1762 | char hold[sizeof (gdb_sigset_t)]; |
c3f6f71d JM |
1763 | } arg; |
1764 | ||
1765 | arg.cmd = PCSHOLD; | |
37de36c6 | 1766 | memcpy (&arg.hold, sighold, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1767 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); |
1768 | } | |
c906108c | 1769 | #else |
c3f6f71d | 1770 | win = (ioctl (pi->ctl_fd, PIOCSHOLD, sighold) >= 0); |
c906108c | 1771 | #endif |
77382aee PA |
1772 | /* The above operation renders the procinfo's cached pstatus |
1773 | obsolete. */ | |
c3f6f71d JM |
1774 | pi->status_valid = 0; |
1775 | ||
1776 | return win; | |
c906108c SS |
1777 | } |
1778 | ||
77382aee PA |
1779 | /* Returns the set of signals that are held / blocked. Will also copy |
1780 | the sigset if SAVE is non-zero. */ | |
c906108c | 1781 | |
d3581e61 | 1782 | static gdb_sigset_t * |
37de36c6 | 1783 | proc_get_held_signals (procinfo *pi, gdb_sigset_t *save) |
c906108c | 1784 | { |
37de36c6 | 1785 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1786 | |
77382aee PA |
1787 | /* We should never have to apply this operation to any procinfo |
1788 | except the one for the main process. If that ever changes for | |
1789 | any reason, then take out the following clause and replace it | |
1790 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1791 | |
c3f6f71d JM |
1792 | if (pi->tid != 0) |
1793 | pi = find_procinfo_or_die (pi->pid, 0); | |
1794 | ||
1795 | #ifdef NEW_PROC_API | |
1796 | if (!pi->status_valid) | |
1797 | if (!proc_get_status (pi)) | |
1798 | return NULL; | |
1799 | ||
c3f6f71d | 1800 | ret = &pi->prstatus.pr_lwp.pr_lwphold; |
c3f6f71d JM |
1801 | #else /* not NEW_PROC_API */ |
1802 | { | |
37de36c6 | 1803 | static gdb_sigset_t sigheld; |
c3f6f71d JM |
1804 | |
1805 | if (ioctl (pi->ctl_fd, PIOCGHOLD, &sigheld) >= 0) | |
1806 | ret = &sigheld; | |
1807 | } | |
1808 | #endif /* NEW_PROC_API */ | |
1809 | if (save && ret) | |
37de36c6 | 1810 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c3f6f71d JM |
1811 | |
1812 | return ret; | |
c906108c SS |
1813 | } |
1814 | ||
77382aee PA |
1815 | /* Returns the set of signals that are traced / debugged. Will also |
1816 | copy the sigset if SAVE is non-zero. */ | |
c3f6f71d | 1817 | |
d3581e61 | 1818 | static gdb_sigset_t * |
37de36c6 | 1819 | proc_get_traced_signals (procinfo *pi, gdb_sigset_t *save) |
c906108c | 1820 | { |
37de36c6 | 1821 | gdb_sigset_t *ret = NULL; |
c3f6f71d | 1822 | |
77382aee PA |
1823 | /* We should never have to apply this operation to any procinfo |
1824 | except the one for the main process. If that ever changes for | |
1825 | any reason, then take out the following clause and replace it | |
1826 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1827 | |
c3f6f71d JM |
1828 | if (pi->tid != 0) |
1829 | pi = find_procinfo_or_die (pi->pid, 0); | |
1830 | ||
1831 | #ifdef NEW_PROC_API | |
1832 | if (!pi->status_valid) | |
1833 | if (!proc_get_status (pi)) | |
1834 | return NULL; | |
1835 | ||
1836 | ret = &pi->prstatus.pr_sigtrace; | |
1837 | #else | |
1838 | { | |
37de36c6 | 1839 | static gdb_sigset_t sigtrace; |
c3f6f71d JM |
1840 | |
1841 | if (ioctl (pi->ctl_fd, PIOCGTRACE, &sigtrace) >= 0) | |
1842 | ret = &sigtrace; | |
1843 | } | |
c906108c | 1844 | #endif |
c3f6f71d | 1845 | if (save && ret) |
37de36c6 | 1846 | memcpy (save, ret, sizeof (gdb_sigset_t)); |
c906108c | 1847 | |
c3f6f71d JM |
1848 | return ret; |
1849 | } | |
c906108c | 1850 | |
77382aee PA |
1851 | /* Returns the set of hardware faults that are traced /debugged. Will |
1852 | also copy the faultset if SAVE is non-zero. */ | |
c3f6f71d | 1853 | |
d3581e61 | 1854 | static fltset_t * |
fba45db2 | 1855 | proc_get_traced_faults (procinfo *pi, fltset_t *save) |
c3f6f71d JM |
1856 | { |
1857 | fltset_t *ret = NULL; | |
1858 | ||
77382aee PA |
1859 | /* We should never have to apply this operation to any procinfo |
1860 | except the one for the main process. If that ever changes for | |
1861 | any reason, then take out the following clause and replace it | |
1862 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1863 | |
c3f6f71d JM |
1864 | if (pi->tid != 0) |
1865 | pi = find_procinfo_or_die (pi->pid, 0); | |
1866 | ||
1867 | #ifdef NEW_PROC_API | |
1868 | if (!pi->status_valid) | |
1869 | if (!proc_get_status (pi)) | |
1870 | return NULL; | |
1871 | ||
1872 | ret = &pi->prstatus.pr_flttrace; | |
1873 | #else | |
1874 | { | |
1875 | static fltset_t flttrace; | |
1876 | ||
1877 | if (ioctl (pi->ctl_fd, PIOCGFAULT, &flttrace) >= 0) | |
1878 | ret = &flttrace; | |
1879 | } | |
1880 | #endif | |
1881 | if (save && ret) | |
1882 | memcpy (save, ret, sizeof (fltset_t)); | |
c906108c | 1883 | |
c3f6f71d JM |
1884 | return ret; |
1885 | } | |
c906108c | 1886 | |
77382aee PA |
1887 | /* Returns the set of syscalls that are traced /debugged on entry. |
1888 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1889 | |
d3581e61 | 1890 | static sysset_t * |
fba45db2 | 1891 | proc_get_traced_sysentry (procinfo *pi, sysset_t *save) |
c3f6f71d JM |
1892 | { |
1893 | sysset_t *ret = NULL; | |
1894 | ||
77382aee PA |
1895 | /* We should never have to apply this operation to any procinfo |
1896 | except the one for the main process. If that ever changes for | |
1897 | any reason, then take out the following clause and replace it | |
1898 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1899 | |
c3f6f71d JM |
1900 | if (pi->tid != 0) |
1901 | pi = find_procinfo_or_die (pi->pid, 0); | |
1902 | ||
1903 | #ifdef NEW_PROC_API | |
1904 | if (!pi->status_valid) | |
1905 | if (!proc_get_status (pi)) | |
1906 | return NULL; | |
1907 | ||
37de36c6 | 1908 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 1909 | ret = &pi->prstatus.pr_sysentry; |
37de36c6 KB |
1910 | #else /* DYNAMIC_SYSCALLS */ |
1911 | { | |
1912 | static sysset_t *sysentry; | |
1913 | size_t size; | |
1914 | ||
1915 | if (!sysentry) | |
1916 | sysentry = sysset_t_alloc (pi); | |
1917 | ret = sysentry; | |
1918 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
1919 | return NULL; | |
1920 | if (pi->prstatus.pr_sysentry_offset == 0) | |
1921 | { | |
1922 | gdb_premptysysset (sysentry); | |
1923 | } | |
1924 | else | |
1925 | { | |
1926 | int rsize; | |
1927 | ||
1928 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysentry_offset, | |
77382aee | 1929 | SEEK_SET) |
37de36c6 KB |
1930 | != (off_t) pi->prstatus.pr_sysentry_offset) |
1931 | return NULL; | |
1932 | size = sysset_t_size (pi); | |
1933 | gdb_premptysysset (sysentry); | |
1934 | rsize = read (pi->status_fd, sysentry, size); | |
1935 | if (rsize < 0) | |
1936 | return NULL; | |
1937 | } | |
1938 | } | |
1939 | #endif /* DYNAMIC_SYSCALLS */ | |
1940 | #else /* !NEW_PROC_API */ | |
c3f6f71d JM |
1941 | { |
1942 | static sysset_t sysentry; | |
c906108c | 1943 | |
c3f6f71d JM |
1944 | if (ioctl (pi->ctl_fd, PIOCGENTRY, &sysentry) >= 0) |
1945 | ret = &sysentry; | |
1946 | } | |
37de36c6 | 1947 | #endif /* NEW_PROC_API */ |
c3f6f71d | 1948 | if (save && ret) |
37de36c6 | 1949 | memcpy (save, ret, sysset_t_size (pi)); |
c906108c | 1950 | |
c3f6f71d JM |
1951 | return ret; |
1952 | } | |
c5aa993b | 1953 | |
77382aee PA |
1954 | /* Returns the set of syscalls that are traced /debugged on exit. |
1955 | Will also copy the syscall set if SAVE is non-zero. */ | |
c906108c | 1956 | |
d3581e61 | 1957 | static sysset_t * |
fba45db2 | 1958 | proc_get_traced_sysexit (procinfo *pi, sysset_t *save) |
c906108c | 1959 | { |
c3f6f71d JM |
1960 | sysset_t * ret = NULL; |
1961 | ||
77382aee PA |
1962 | /* We should never have to apply this operation to any procinfo |
1963 | except the one for the main process. If that ever changes for | |
1964 | any reason, then take out the following clause and replace it | |
1965 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 1966 | |
c3f6f71d JM |
1967 | if (pi->tid != 0) |
1968 | pi = find_procinfo_or_die (pi->pid, 0); | |
1969 | ||
1970 | #ifdef NEW_PROC_API | |
1971 | if (!pi->status_valid) | |
1972 | if (!proc_get_status (pi)) | |
1973 | return NULL; | |
1974 | ||
37de36c6 | 1975 | #ifndef DYNAMIC_SYSCALLS |
c3f6f71d | 1976 | ret = &pi->prstatus.pr_sysexit; |
37de36c6 KB |
1977 | #else /* DYNAMIC_SYSCALLS */ |
1978 | { | |
1979 | static sysset_t *sysexit; | |
1980 | size_t size; | |
1981 | ||
1982 | if (!sysexit) | |
1983 | sysexit = sysset_t_alloc (pi); | |
1984 | ret = sysexit; | |
1985 | if (pi->status_fd == 0 && open_procinfo_files (pi, FD_STATUS) == 0) | |
1986 | return NULL; | |
1987 | if (pi->prstatus.pr_sysexit_offset == 0) | |
1988 | { | |
1989 | gdb_premptysysset (sysexit); | |
1990 | } | |
1991 | else | |
1992 | { | |
1993 | int rsize; | |
1994 | ||
77382aee PA |
1995 | if (lseek (pi->status_fd, (off_t) pi->prstatus.pr_sysexit_offset, |
1996 | SEEK_SET) | |
37de36c6 KB |
1997 | != (off_t) pi->prstatus.pr_sysexit_offset) |
1998 | return NULL; | |
1999 | size = sysset_t_size (pi); | |
2000 | gdb_premptysysset (sysexit); | |
2001 | rsize = read (pi->status_fd, sysexit, size); | |
2002 | if (rsize < 0) | |
2003 | return NULL; | |
2004 | } | |
2005 | } | |
2006 | #endif /* DYNAMIC_SYSCALLS */ | |
c3f6f71d JM |
2007 | #else |
2008 | { | |
2009 | static sysset_t sysexit; | |
c5aa993b | 2010 | |
c3f6f71d JM |
2011 | if (ioctl (pi->ctl_fd, PIOCGEXIT, &sysexit) >= 0) |
2012 | ret = &sysexit; | |
2013 | } | |
2014 | #endif | |
2015 | if (save && ret) | |
37de36c6 | 2016 | memcpy (save, ret, sysset_t_size (pi)); |
c3f6f71d JM |
2017 | |
2018 | return ret; | |
2019 | } | |
c906108c | 2020 | |
77382aee PA |
2021 | /* The current fault (if any) is cleared; the associated signal will |
2022 | not be sent to the process or LWP when it resumes. Returns | |
2023 | non-zero for success, zero for failure. */ | |
c906108c | 2024 | |
d3581e61 | 2025 | static int |
fba45db2 | 2026 | proc_clear_current_fault (procinfo *pi) |
c3f6f71d JM |
2027 | { |
2028 | int win; | |
2029 | ||
77382aee PA |
2030 | /* We should never have to apply this operation to any procinfo |
2031 | except the one for the main process. If that ever changes for | |
2032 | any reason, then take out the following clause and replace it | |
2033 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2034 | |
c3f6f71d JM |
2035 | if (pi->tid != 0) |
2036 | pi = find_procinfo_or_die (pi->pid, 0); | |
2037 | ||
2038 | #ifdef NEW_PROC_API | |
2039 | { | |
37de36c6 | 2040 | procfs_ctl_t cmd = PCCFAULT; |
f4a14ae6 | 2041 | |
c3f6f71d JM |
2042 | win = (write (pi->ctl_fd, (void *) &cmd, sizeof (cmd)) == sizeof (cmd)); |
2043 | } | |
2044 | #else | |
2045 | win = (ioctl (pi->ctl_fd, PIOCCFAULT, 0) >= 0); | |
2046 | #endif | |
2047 | ||
2048 | return win; | |
c906108c SS |
2049 | } |
2050 | ||
77382aee PA |
2051 | /* Set the "current signal" that will be delivered next to the |
2052 | process. NOTE: semantics are different from those of KILL. This | |
2053 | signal will be delivered to the process or LWP immediately when it | |
2054 | is resumed (even if the signal is held/blocked); it will NOT | |
2055 | immediately cause another event of interest, and will NOT first | |
2056 | trap back to the debugger. Returns non-zero for success, zero for | |
2057 | failure. */ | |
c3f6f71d | 2058 | |
d3581e61 | 2059 | static int |
fba45db2 | 2060 | proc_set_current_signal (procinfo *pi, int signo) |
c3f6f71d JM |
2061 | { |
2062 | int win; | |
2063 | struct { | |
37de36c6 | 2064 | procfs_ctl_t cmd; |
c3f6f71d | 2065 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2066 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2067 | } arg; |
73930d4d | 2068 | gdb_siginfo_t mysinfo; |
c162e8c9 JM |
2069 | ptid_t wait_ptid; |
2070 | struct target_waitstatus wait_status; | |
c3f6f71d | 2071 | |
77382aee PA |
2072 | /* We should never have to apply this operation to any procinfo |
2073 | except the one for the main process. If that ever changes for | |
2074 | any reason, then take out the following clause and replace it | |
2075 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2076 | |
c3f6f71d JM |
2077 | if (pi->tid != 0) |
2078 | pi = find_procinfo_or_die (pi->pid, 0); | |
2079 | ||
2080 | #ifdef PROCFS_DONT_PIOCSSIG_CURSIG | |
2081 | /* With Alpha OSF/1 procfs, the kernel gets really confused if it | |
77382aee PA |
2082 | receives a PIOCSSIG with a signal identical to the current |
2083 | signal, it messes up the current signal. Work around the kernel | |
2084 | bug. */ | |
c3f6f71d JM |
2085 | if (signo > 0 && |
2086 | signo == proc_cursig (pi)) | |
0df8b418 | 2087 | return 1; /* I assume this is a success? */ |
c3f6f71d JM |
2088 | #endif |
2089 | ||
2090 | /* The pointer is just a type alias. */ | |
c162e8c9 JM |
2091 | get_last_target_status (&wait_ptid, &wait_status); |
2092 | if (ptid_equal (wait_ptid, inferior_ptid) | |
2093 | && wait_status.kind == TARGET_WAITKIND_STOPPED | |
2ea28649 | 2094 | && wait_status.value.sig == gdb_signal_from_host (signo) |
c162e8c9 JM |
2095 | && proc_get_status (pi) |
2096 | #ifdef NEW_PROC_API | |
2097 | && pi->prstatus.pr_lwp.pr_info.si_signo == signo | |
2098 | #else | |
2099 | && pi->prstatus.pr_info.si_signo == signo | |
2100 | #endif | |
2101 | ) | |
2102 | /* Use the siginfo associated with the signal being | |
2103 | redelivered. */ | |
2104 | #ifdef NEW_PROC_API | |
73930d4d | 2105 | memcpy (arg.sinfo, &pi->prstatus.pr_lwp.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 | 2106 | #else |
73930d4d | 2107 | memcpy (arg.sinfo, &pi->prstatus.pr_info, sizeof (gdb_siginfo_t)); |
c162e8c9 JM |
2108 | #endif |
2109 | else | |
2110 | { | |
73930d4d KH |
2111 | mysinfo.si_signo = signo; |
2112 | mysinfo.si_code = 0; | |
2113 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2114 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2115 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c162e8c9 | 2116 | } |
c3f6f71d JM |
2117 | |
2118 | #ifdef NEW_PROC_API | |
2119 | arg.cmd = PCSSIG; | |
2120 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2121 | #else | |
2122 | win = (ioctl (pi->ctl_fd, PIOCSSIG, (void *) &arg.sinfo) >= 0); | |
2123 | #endif | |
c906108c | 2124 | |
c3f6f71d JM |
2125 | return win; |
2126 | } | |
c906108c | 2127 | |
77382aee PA |
2128 | /* The current signal (if any) is cleared, and is not sent to the |
2129 | process or LWP when it resumes. Returns non-zero for success, zero | |
2130 | for failure. */ | |
c906108c | 2131 | |
d3581e61 | 2132 | static int |
fba45db2 | 2133 | proc_clear_current_signal (procinfo *pi) |
c3f6f71d JM |
2134 | { |
2135 | int win; | |
2136 | ||
77382aee PA |
2137 | /* We should never have to apply this operation to any procinfo |
2138 | except the one for the main process. If that ever changes for | |
2139 | any reason, then take out the following clause and replace it | |
2140 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2141 | |
c3f6f71d JM |
2142 | if (pi->tid != 0) |
2143 | pi = find_procinfo_or_die (pi->pid, 0); | |
2144 | ||
2145 | #ifdef NEW_PROC_API | |
2146 | { | |
2147 | struct { | |
37de36c6 | 2148 | procfs_ctl_t cmd; |
c3f6f71d | 2149 | /* Use char array to avoid alignment issues. */ |
37de36c6 | 2150 | char sinfo[sizeof (gdb_siginfo_t)]; |
c3f6f71d | 2151 | } arg; |
73930d4d | 2152 | gdb_siginfo_t mysinfo; |
c3f6f71d JM |
2153 | |
2154 | arg.cmd = PCSSIG; | |
2155 | /* The pointer is just a type alias. */ | |
73930d4d KH |
2156 | mysinfo.si_signo = 0; |
2157 | mysinfo.si_code = 0; | |
2158 | mysinfo.si_errno = 0; | |
2159 | mysinfo.si_pid = getpid (); /* ?why? */ | |
2160 | mysinfo.si_uid = getuid (); /* ?why? */ | |
2161 | memcpy (arg.sinfo, &mysinfo, sizeof (gdb_siginfo_t)); | |
c3f6f71d JM |
2162 | |
2163 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2164 | } | |
2165 | #else | |
2166 | win = (ioctl (pi->ctl_fd, PIOCSSIG, 0) >= 0); | |
2167 | #endif | |
c906108c | 2168 | |
c3f6f71d JM |
2169 | return win; |
2170 | } | |
c906108c | 2171 | |
772cf8be MK |
2172 | /* Return the general-purpose registers for the process or LWP |
2173 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2174 | |
d3581e61 | 2175 | static gdb_gregset_t * |
fba45db2 | 2176 | proc_get_gregs (procinfo *pi) |
c3f6f71d JM |
2177 | { |
2178 | if (!pi->status_valid || !pi->gregs_valid) | |
2179 | if (!proc_get_status (pi)) | |
2180 | return NULL; | |
2181 | ||
c3f6f71d | 2182 | #ifdef NEW_PROC_API |
c3f6f71d | 2183 | return &pi->prstatus.pr_lwp.pr_reg; |
772cf8be | 2184 | #else |
c3f6f71d | 2185 | return &pi->prstatus.pr_reg; |
772cf8be | 2186 | #endif |
c3f6f71d | 2187 | } |
c5aa993b | 2188 | |
772cf8be MK |
2189 | /* Return the general-purpose registers for the process or LWP |
2190 | corresponding to PI. Upon failure, return NULL. */ | |
c906108c | 2191 | |
d3581e61 | 2192 | static gdb_fpregset_t * |
fba45db2 | 2193 | proc_get_fpregs (procinfo *pi) |
c906108c | 2194 | { |
c3f6f71d JM |
2195 | #ifdef NEW_PROC_API |
2196 | if (!pi->status_valid || !pi->fpregs_valid) | |
2197 | if (!proc_get_status (pi)) | |
2198 | return NULL; | |
2199 | ||
c3f6f71d | 2200 | return &pi->prstatus.pr_lwp.pr_fpreg; |
c5aa993b | 2201 | |
772cf8be | 2202 | #else /* not NEW_PROC_API */ |
c3f6f71d | 2203 | if (pi->fpregs_valid) |
772cf8be | 2204 | return &pi->fpregset; /* Already got 'em. */ |
c3f6f71d | 2205 | else |
c906108c | 2206 | { |
772cf8be | 2207 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2208 | { |
c3f6f71d | 2209 | return NULL; |
c906108c | 2210 | } |
c3f6f71d | 2211 | else |
c906108c | 2212 | { |
772cf8be | 2213 | # ifdef PIOCTGFPREG |
c3f6f71d JM |
2214 | struct { |
2215 | long pr_count; | |
2216 | tid_t pr_error_thread; | |
2217 | tfpregset_t thread_1; | |
2218 | } thread_fpregs; | |
2219 | ||
2220 | thread_fpregs.pr_count = 1; | |
2221 | thread_fpregs.thread_1.tid = pi->tid; | |
2222 | ||
772cf8be MK |
2223 | if (pi->tid == 0 |
2224 | && ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) | |
c3f6f71d JM |
2225 | { |
2226 | pi->fpregs_valid = 1; | |
772cf8be | 2227 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d | 2228 | } |
772cf8be MK |
2229 | else if (pi->tid != 0 |
2230 | && ioctl (pi->ctl_fd, PIOCTGFPREG, &thread_fpregs) >= 0) | |
c3f6f71d JM |
2231 | { |
2232 | memcpy (&pi->fpregset, &thread_fpregs.thread_1.pr_fpregs, | |
2233 | sizeof (pi->fpregset)); | |
2234 | pi->fpregs_valid = 1; | |
772cf8be | 2235 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2236 | } |
2237 | else | |
2238 | { | |
2239 | return NULL; | |
2240 | } | |
772cf8be | 2241 | # else |
c3f6f71d JM |
2242 | if (ioctl (pi->ctl_fd, PIOCGFPREG, &pi->fpregset) >= 0) |
2243 | { | |
2244 | pi->fpregs_valid = 1; | |
772cf8be | 2245 | return &pi->fpregset; /* Got 'em now! */ |
c3f6f71d JM |
2246 | } |
2247 | else | |
2248 | { | |
2249 | return NULL; | |
2250 | } | |
772cf8be | 2251 | # endif |
c906108c | 2252 | } |
c906108c | 2253 | } |
772cf8be | 2254 | #endif /* NEW_PROC_API */ |
c906108c SS |
2255 | } |
2256 | ||
772cf8be MK |
2257 | /* Write the general-purpose registers back to the process or LWP |
2258 | corresponding to PI. Return non-zero for success, zero for | |
2259 | failure. */ | |
c3f6f71d | 2260 | |
d3581e61 | 2261 | static int |
fba45db2 | 2262 | proc_set_gregs (procinfo *pi) |
c906108c | 2263 | { |
c3f6f71d JM |
2264 | gdb_gregset_t *gregs; |
2265 | int win; | |
c5aa993b | 2266 | |
772cf8be MK |
2267 | gregs = proc_get_gregs (pi); |
2268 | if (gregs == NULL) | |
2269 | return 0; /* proc_get_regs has already warned. */ | |
c3f6f71d | 2270 | |
772cf8be | 2271 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2272 | { |
c3f6f71d | 2273 | return 0; |
c906108c | 2274 | } |
c3f6f71d | 2275 | else |
c906108c | 2276 | { |
c3f6f71d JM |
2277 | #ifdef NEW_PROC_API |
2278 | struct { | |
37de36c6 | 2279 | procfs_ctl_t cmd; |
c3f6f71d JM |
2280 | /* Use char array to avoid alignment issues. */ |
2281 | char gregs[sizeof (gdb_gregset_t)]; | |
2282 | } arg; | |
2283 | ||
772cf8be | 2284 | arg.cmd = PCSREG; |
c3f6f71d JM |
2285 | memcpy (&arg.gregs, gregs, sizeof (arg.gregs)); |
2286 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2287 | #else | |
2288 | win = (ioctl (pi->ctl_fd, PIOCSREG, gregs) >= 0); | |
2289 | #endif | |
c906108c | 2290 | } |
c3f6f71d | 2291 | |
772cf8be | 2292 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2293 | pi->gregs_valid = 0; |
2294 | return win; | |
c906108c SS |
2295 | } |
2296 | ||
772cf8be MK |
2297 | /* Write the floating-pointer registers back to the process or LWP |
2298 | corresponding to PI. Return non-zero for success, zero for | |
2299 | failure. */ | |
c3f6f71d | 2300 | |
d3581e61 | 2301 | static int |
fba45db2 | 2302 | proc_set_fpregs (procinfo *pi) |
c906108c | 2303 | { |
c3f6f71d JM |
2304 | gdb_fpregset_t *fpregs; |
2305 | int win; | |
2306 | ||
772cf8be MK |
2307 | fpregs = proc_get_fpregs (pi); |
2308 | if (fpregs == NULL) | |
2309 | return 0; /* proc_get_fpregs has already warned. */ | |
c5aa993b | 2310 | |
772cf8be | 2311 | if (pi->ctl_fd == 0 && open_procinfo_files (pi, FD_CTL) == 0) |
c906108c | 2312 | { |
c3f6f71d | 2313 | return 0; |
c906108c | 2314 | } |
c3f6f71d | 2315 | else |
c906108c | 2316 | { |
c3f6f71d JM |
2317 | #ifdef NEW_PROC_API |
2318 | struct { | |
37de36c6 | 2319 | procfs_ctl_t cmd; |
c3f6f71d JM |
2320 | /* Use char array to avoid alignment issues. */ |
2321 | char fpregs[sizeof (gdb_fpregset_t)]; | |
2322 | } arg; | |
2323 | ||
772cf8be | 2324 | arg.cmd = PCSFPREG; |
c3f6f71d JM |
2325 | memcpy (&arg.fpregs, fpregs, sizeof (arg.fpregs)); |
2326 | win = (write (pi->ctl_fd, (void *) &arg, sizeof (arg)) == sizeof (arg)); | |
2327 | #else | |
772cf8be | 2328 | # ifdef PIOCTSFPREG |
c3f6f71d JM |
2329 | if (pi->tid == 0) |
2330 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); | |
2331 | else | |
2332 | { | |
2333 | struct { | |
2334 | long pr_count; | |
2335 | tid_t pr_error_thread; | |
2336 | tfpregset_t thread_1; | |
2337 | } thread_fpregs; | |
2338 | ||
2339 | thread_fpregs.pr_count = 1; | |
2340 | thread_fpregs.thread_1.tid = pi->tid; | |
2341 | memcpy (&thread_fpregs.thread_1.pr_fpregs, fpregs, | |
2342 | sizeof (*fpregs)); | |
2343 | win = (ioctl (pi->ctl_fd, PIOCTSFPREG, &thread_fpregs) >= 0); | |
2344 | } | |
772cf8be | 2345 | # else |
c3f6f71d | 2346 | win = (ioctl (pi->ctl_fd, PIOCSFPREG, fpregs) >= 0); |
772cf8be MK |
2347 | # endif |
2348 | #endif /* NEW_PROC_API */ | |
c906108c | 2349 | } |
c3f6f71d | 2350 | |
772cf8be | 2351 | /* Policy: writing the registers invalidates our cache. */ |
c3f6f71d JM |
2352 | pi->fpregs_valid = 0; |
2353 | return win; | |
c906108c SS |
2354 | } |
2355 | ||
77382aee PA |
2356 | /* Send a signal to the proc or lwp with the semantics of "kill()". |
2357 | Returns non-zero for success, zero for failure. */ | |
c906108c | 2358 | |
d3581e61 | 2359 | static int |
fba45db2 | 2360 | proc_kill (procinfo *pi, int signo) |
c3f6f71d JM |
2361 | { |
2362 | int win; | |
c906108c | 2363 | |
77382aee PA |
2364 | /* We might conceivably apply this operation to an LWP, and the |
2365 | LWP's ctl file descriptor might not be open. */ | |
c906108c | 2366 | |
c3f6f71d JM |
2367 | if (pi->ctl_fd == 0 && |
2368 | open_procinfo_files (pi, FD_CTL) == 0) | |
2369 | { | |
2370 | return 0; | |
2371 | } | |
2372 | else | |
2373 | { | |
2374 | #ifdef NEW_PROC_API | |
37de36c6 | 2375 | procfs_ctl_t cmd[2]; |
c906108c | 2376 | |
c3f6f71d JM |
2377 | cmd[0] = PCKILL; |
2378 | cmd[1] = signo; | |
2379 | win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd)); | |
2380 | #else /* ioctl method */ | |
2381 | /* FIXME: do I need the Alpha OSF fixups present in | |
0df8b418 | 2382 | procfs.c/unconditionally_kill_inferior? Perhaps only for SIGKILL? */ |
c3f6f71d JM |
2383 | win = (ioctl (pi->ctl_fd, PIOCKILL, &signo) >= 0); |
2384 | #endif | |
2385 | } | |
c906108c | 2386 | |
c3f6f71d JM |
2387 | return win; |
2388 | } | |
c906108c | 2389 | |
77382aee PA |
2390 | /* Find the pid of the process that started this one. Returns the |
2391 | parent process pid, or zero. */ | |
c906108c | 2392 | |
d3581e61 | 2393 | static int |
fba45db2 | 2394 | proc_parent_pid (procinfo *pi) |
c906108c | 2395 | { |
77382aee PA |
2396 | /* We should never have to apply this operation to any procinfo |
2397 | except the one for the main process. If that ever changes for | |
2398 | any reason, then take out the following clause and replace it | |
2399 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2400 | |
c3f6f71d JM |
2401 | if (pi->tid != 0) |
2402 | pi = find_procinfo_or_die (pi->pid, 0); | |
2403 | ||
2404 | if (!pi->status_valid) | |
2405 | if (!proc_get_status (pi)) | |
2406 | return 0; | |
c5aa993b | 2407 | |
c3f6f71d JM |
2408 | return pi->prstatus.pr_ppid; |
2409 | } | |
2410 | ||
9a043c1d AC |
2411 | /* Convert a target address (a.k.a. CORE_ADDR) into a host address |
2412 | (a.k.a void pointer)! */ | |
2413 | ||
1ca8fce0 | 2414 | #if (defined (PCWATCH) || defined (PIOCSWATCH)) \ |
05b4bd79 | 2415 | && !(defined (PIOCOPENLWP)) |
9a043c1d AC |
2416 | static void * |
2417 | procfs_address_to_host_pointer (CORE_ADDR addr) | |
2418 | { | |
f5656ead | 2419 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
9a043c1d AC |
2420 | void *ptr; |
2421 | ||
4e906f53 | 2422 | gdb_assert (sizeof (ptr) == TYPE_LENGTH (ptr_type)); |
f5656ead | 2423 | gdbarch_address_to_pointer (target_gdbarch (), ptr_type, |
0b62613e | 2424 | (gdb_byte *) &ptr, addr); |
9a043c1d AC |
2425 | return ptr; |
2426 | } | |
1ca8fce0 | 2427 | #endif |
9a043c1d | 2428 | |
a0911fd0 | 2429 | static int |
fba45db2 | 2430 | proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags) |
c3f6f71d | 2431 | { |
d1a7880c PA |
2432 | #if !defined (PCWATCH) && !defined (PIOCSWATCH) |
2433 | /* If neither or these is defined, we can't support watchpoints. | |
2434 | This just avoids possibly failing to compile the below on such | |
2435 | systems. */ | |
c3f6f71d JM |
2436 | return 0; |
2437 | #else | |
0df8b418 | 2438 | /* Horrible hack! Detect Solaris 2.5, because this doesn't work on 2.5. */ |
05b4bd79 | 2439 | #if defined (PIOCOPENLWP) /* Solaris 2.5: bail out. */ |
c3f6f71d JM |
2440 | return 0; |
2441 | #else | |
2442 | struct { | |
37de36c6 | 2443 | procfs_ctl_t cmd; |
c3f6f71d JM |
2444 | char watch[sizeof (prwatch_t)]; |
2445 | } arg; | |
73930d4d | 2446 | prwatch_t pwatch; |
c3f6f71d | 2447 | |
9a043c1d AC |
2448 | /* NOTE: cagney/2003-02-01: Even more horrible hack. Need to |
2449 | convert a target address into something that can be stored in a | |
2450 | native data structure. */ | |
831e682e | 2451 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
73930d4d | 2452 | pwatch.pr_vaddr = (uintptr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2453 | #else |
73930d4d | 2454 | pwatch.pr_vaddr = (caddr_t) procfs_address_to_host_pointer (addr); |
831e682e | 2455 | #endif |
73930d4d KH |
2456 | pwatch.pr_size = len; |
2457 | pwatch.pr_wflags = wflags; | |
c3f6f71d JM |
2458 | #if defined(NEW_PROC_API) && defined (PCWATCH) |
2459 | arg.cmd = PCWATCH; | |
73930d4d | 2460 | memcpy (arg.watch, &pwatch, sizeof (prwatch_t)); |
c3f6f71d JM |
2461 | return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg)); |
2462 | #else | |
2463 | #if defined (PIOCSWATCH) | |
73930d4d | 2464 | return (ioctl (pi->ctl_fd, PIOCSWATCH, &pwatch) >= 0); |
c3f6f71d JM |
2465 | #else |
2466 | return 0; /* Fail */ | |
2467 | #endif | |
2468 | #endif | |
2469 | #endif | |
2470 | #endif | |
c906108c SS |
2471 | } |
2472 | ||
965b60ee | 2473 | #if (defined(__i386__) || defined(__x86_64__)) && defined (sun) |
c906108c | 2474 | |
c3f6f71d | 2475 | #include <sys/sysi86.h> |
c906108c | 2476 | |
77382aee PA |
2477 | /* The KEY is actually the value of the lower 16 bits of the GS |
2478 | register for the LWP that we're interested in. Returns the | |
2479 | matching ssh struct (LDT entry). */ | |
c906108c | 2480 | |
337c776f | 2481 | static struct ssd * |
fba45db2 | 2482 | proc_get_LDT_entry (procinfo *pi, int key) |
c906108c | 2483 | { |
c3f6f71d JM |
2484 | static struct ssd *ldt_entry = NULL; |
2485 | #ifdef NEW_PROC_API | |
2486 | char pathname[MAX_PROC_NAME_SIZE]; | |
2487 | struct cleanup *old_chain = NULL; | |
2488 | int fd; | |
2489 | ||
2490 | /* Allocate space for one LDT entry. | |
2491 | This alloc must persist, because we return a pointer to it. */ | |
2492 | if (ldt_entry == NULL) | |
8d749320 | 2493 | ldt_entry = XNEW (struct ssd); |
c3f6f71d JM |
2494 | |
2495 | /* Open the file descriptor for the LDT table. */ | |
2496 | sprintf (pathname, "/proc/%d/ldt", pi->pid); | |
4d1bcd09 | 2497 | if ((fd = open_with_retry (pathname, O_RDONLY)) < 0) |
c906108c | 2498 | { |
c3f6f71d JM |
2499 | proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__); |
2500 | return NULL; | |
c906108c | 2501 | } |
0df8b418 | 2502 | /* Make sure it gets closed again! */ |
004527cb | 2503 | old_chain = make_cleanup_close (fd); |
c906108c | 2504 | |
c3f6f71d JM |
2505 | /* Now 'read' thru the table, find a match and return it. */ |
2506 | while (read (fd, ldt_entry, sizeof (struct ssd)) == sizeof (struct ssd)) | |
c906108c | 2507 | { |
c3f6f71d JM |
2508 | if (ldt_entry->sel == 0 && |
2509 | ldt_entry->bo == 0 && | |
2510 | ldt_entry->acc1 == 0 && | |
2511 | ldt_entry->acc2 == 0) | |
2512 | break; /* end of table */ | |
0df8b418 | 2513 | /* If key matches, return this entry. */ |
c3f6f71d JM |
2514 | if (ldt_entry->sel == key) |
2515 | return ldt_entry; | |
c906108c | 2516 | } |
0df8b418 | 2517 | /* Loop ended, match not found. */ |
c3f6f71d JM |
2518 | return NULL; |
2519 | #else | |
2520 | int nldt, i; | |
2521 | static int nalloc = 0; | |
c906108c | 2522 | |
c3f6f71d JM |
2523 | /* Get the number of LDT entries. */ |
2524 | if (ioctl (pi->ctl_fd, PIOCNLDT, &nldt) < 0) | |
c906108c | 2525 | { |
c3f6f71d JM |
2526 | proc_warn (pi, "proc_get_LDT_entry (PIOCNLDT)", __LINE__); |
2527 | return NULL; | |
c906108c SS |
2528 | } |
2529 | ||
0df8b418 MS |
2530 | /* Allocate space for the number of LDT entries. */ |
2531 | /* This alloc has to persist, 'cause we return a pointer to it. */ | |
c3f6f71d | 2532 | if (nldt > nalloc) |
c906108c | 2533 | { |
19958708 | 2534 | ldt_entry = (struct ssd *) |
c3f6f71d JM |
2535 | xrealloc (ldt_entry, (nldt + 1) * sizeof (struct ssd)); |
2536 | nalloc = nldt; | |
2537 | } | |
19958708 | 2538 | |
c3f6f71d JM |
2539 | /* Read the whole table in one gulp. */ |
2540 | if (ioctl (pi->ctl_fd, PIOCLDT, ldt_entry) < 0) | |
2541 | { | |
2542 | proc_warn (pi, "proc_get_LDT_entry (PIOCLDT)", __LINE__); | |
2543 | return NULL; | |
c906108c SS |
2544 | } |
2545 | ||
0df8b418 | 2546 | /* Search the table and return the (first) entry matching 'key'. */ |
c3f6f71d JM |
2547 | for (i = 0; i < nldt; i++) |
2548 | if (ldt_entry[i].sel == key) | |
2549 | return &ldt_entry[i]; | |
c906108c | 2550 | |
0df8b418 | 2551 | /* Loop ended, match not found. */ |
c3f6f71d JM |
2552 | return NULL; |
2553 | #endif | |
2554 | } | |
c906108c | 2555 | |
77382aee | 2556 | /* Returns the pointer to the LDT entry of PTID. */ |
965b60ee JB |
2557 | |
2558 | struct ssd * | |
2559 | procfs_find_LDT_entry (ptid_t ptid) | |
2560 | { | |
2561 | gdb_gregset_t *gregs; | |
2562 | int key; | |
2563 | procinfo *pi; | |
2564 | ||
0df8b418 | 2565 | /* Find procinfo for the lwp. */ |
dfd4cc63 | 2566 | if ((pi = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid))) == NULL) |
965b60ee | 2567 | { |
0b62613e | 2568 | warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."), |
dfd4cc63 | 2569 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
965b60ee JB |
2570 | return NULL; |
2571 | } | |
0df8b418 | 2572 | /* get its general registers. */ |
965b60ee JB |
2573 | if ((gregs = proc_get_gregs (pi)) == NULL) |
2574 | { | |
0b62613e | 2575 | warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."), |
dfd4cc63 | 2576 | ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
965b60ee JB |
2577 | return NULL; |
2578 | } | |
0df8b418 | 2579 | /* Now extract the GS register's lower 16 bits. */ |
965b60ee JB |
2580 | key = (*gregs)[GS] & 0xffff; |
2581 | ||
0df8b418 | 2582 | /* Find the matching entry and return it. */ |
965b60ee JB |
2583 | return proc_get_LDT_entry (pi, key); |
2584 | } | |
2585 | ||
2586 | #endif | |
c906108c | 2587 | |
c3f6f71d | 2588 | /* =============== END, non-thread part of /proc "MODULE" =============== */ |
c906108c | 2589 | |
c3f6f71d | 2590 | /* =================== Thread "MODULE" =================== */ |
c906108c | 2591 | |
c3f6f71d JM |
2592 | /* NOTE: you'll see more ifdefs and duplication of functions here, |
2593 | since there is a different way to do threads on every OS. */ | |
c906108c | 2594 | |
77382aee | 2595 | /* Returns the number of threads for the process. */ |
c906108c | 2596 | |
c3f6f71d | 2597 | #if defined (PIOCNTHR) && defined (PIOCTLIST) |
77382aee | 2598 | /* OSF version */ |
d3581e61 | 2599 | static int |
fba45db2 | 2600 | proc_get_nthreads (procinfo *pi) |
c3f6f71d JM |
2601 | { |
2602 | int nthreads = 0; | |
c906108c | 2603 | |
c3f6f71d JM |
2604 | if (ioctl (pi->ctl_fd, PIOCNTHR, &nthreads) < 0) |
2605 | proc_warn (pi, "procfs: PIOCNTHR failed", __LINE__); | |
c906108c | 2606 | |
c3f6f71d | 2607 | return nthreads; |
c906108c SS |
2608 | } |
2609 | ||
c3f6f71d JM |
2610 | #else |
2611 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
05b4bd79 | 2612 | /* Solaris version */ |
d3581e61 | 2613 | static int |
fba45db2 | 2614 | proc_get_nthreads (procinfo *pi) |
c906108c | 2615 | { |
c3f6f71d JM |
2616 | if (!pi->status_valid) |
2617 | if (!proc_get_status (pi)) | |
2618 | return 0; | |
c5aa993b | 2619 | |
77382aee PA |
2620 | /* NEW_PROC_API: only works for the process procinfo, because the |
2621 | LWP procinfos do not get prstatus filled in. */ | |
19958708 | 2622 | #ifdef NEW_PROC_API |
0df8b418 | 2623 | if (pi->tid != 0) /* Find the parent process procinfo. */ |
c3f6f71d | 2624 | pi = find_procinfo_or_die (pi->pid, 0); |
c5aa993b | 2625 | #endif |
c3f6f71d | 2626 | return pi->prstatus.pr_nlwp; |
c906108c SS |
2627 | } |
2628 | ||
c3f6f71d | 2629 | #else |
77382aee | 2630 | /* Default version */ |
d3581e61 | 2631 | static int |
fba45db2 | 2632 | proc_get_nthreads (procinfo *pi) |
c906108c | 2633 | { |
c3f6f71d JM |
2634 | return 0; |
2635 | } | |
2636 | #endif | |
2637 | #endif | |
2638 | ||
77382aee PA |
2639 | /* LWP version. |
2640 | ||
2641 | Return the ID of the thread that had an event of interest. | |
2642 | (ie. the one that hit a breakpoint or other traced event). All | |
2643 | other things being equal, this should be the ID of a thread that is | |
2644 | currently executing. */ | |
c3f6f71d JM |
2645 | |
2646 | #if defined (SYS_lwpcreate) || defined (SYS_lwp_create) /* FIXME: multiple */ | |
05b4bd79 | 2647 | /* Solaris version */ |
d3581e61 | 2648 | static int |
fba45db2 | 2649 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 2650 | { |
77382aee PA |
2651 | /* Note: this should be applied to the root procinfo for the |
2652 | process, not to the procinfo for an LWP. If applied to the | |
2653 | procinfo for an LWP, it will simply return that LWP's ID. In | |
2654 | that case, find the parent process procinfo. */ | |
19958708 | 2655 | |
c3f6f71d JM |
2656 | if (pi->tid != 0) |
2657 | pi = find_procinfo_or_die (pi->pid, 0); | |
2658 | ||
2659 | if (!pi->status_valid) | |
2660 | if (!proc_get_status (pi)) | |
2661 | return 0; | |
2662 | ||
2663 | #ifdef NEW_PROC_API | |
2664 | return pi->prstatus.pr_lwp.pr_lwpid; | |
c906108c | 2665 | #else |
c3f6f71d | 2666 | return pi->prstatus.pr_who; |
c906108c | 2667 | #endif |
c3f6f71d | 2668 | } |
c906108c | 2669 | |
c3f6f71d JM |
2670 | #else |
2671 | #if defined (PIOCNTHR) && defined (PIOCTLIST) | |
77382aee | 2672 | /* OSF version */ |
d3581e61 | 2673 | static int |
fba45db2 | 2674 | proc_get_current_thread (procinfo *pi) |
c3f6f71d | 2675 | { |
0df8b418 | 2676 | #if 0 /* FIXME: not ready for prime time? */ |
c3f6f71d JM |
2677 | return pi->prstatus.pr_tid; |
2678 | #else | |
2679 | return 0; | |
2680 | #endif | |
c906108c SS |
2681 | } |
2682 | ||
c3f6f71d | 2683 | #else |
77382aee | 2684 | /* Default version */ |
d3581e61 | 2685 | static int |
fba45db2 | 2686 | proc_get_current_thread (procinfo *pi) |
c906108c | 2687 | { |
c3f6f71d JM |
2688 | return 0; |
2689 | } | |
2690 | ||
2691 | #endif | |
2692 | #endif | |
c906108c | 2693 | |
77382aee PA |
2694 | /* Discover the IDs of all the threads within the process, and create |
2695 | a procinfo for each of them (chained to the parent). This | |
2696 | unfortunately requires a different method on every OS. Returns | |
2697 | non-zero for success, zero for failure. */ | |
c906108c | 2698 | |
a0911fd0 | 2699 | static int |
fba45db2 | 2700 | proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore) |
c3f6f71d JM |
2701 | { |
2702 | if (thread && parent) /* sanity */ | |
c906108c | 2703 | { |
c3f6f71d JM |
2704 | thread->status_valid = 0; |
2705 | if (!proc_get_status (thread)) | |
2706 | destroy_one_procinfo (&parent->thread_list, thread); | |
2707 | } | |
2708 | return 0; /* keep iterating */ | |
2709 | } | |
c5aa993b | 2710 | |
c3f6f71d | 2711 | #if defined (PIOCLSTATUS) |
77382aee | 2712 | /* Solaris 2.5 (ioctl) version */ |
d3581e61 | 2713 | static int |
fba45db2 | 2714 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2715 | { |
2716 | gdb_prstatus_t *prstatus; | |
2717 | struct cleanup *old_chain = NULL; | |
2718 | procinfo *thread; | |
2719 | int nlwp, i; | |
2720 | ||
77382aee PA |
2721 | /* We should never have to apply this operation to any procinfo |
2722 | except the one for the main process. If that ever changes for | |
2723 | any reason, then take out the following clause and replace it | |
2724 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2725 | |
c3f6f71d JM |
2726 | if (pi->tid != 0) |
2727 | pi = find_procinfo_or_die (pi->pid, 0); | |
2728 | ||
2729 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2730 | ||
2731 | if ((nlwp = proc_get_nthreads (pi)) <= 1) | |
2732 | return 1; /* Process is not multi-threaded; nothing to do. */ | |
2733 | ||
8d749320 | 2734 | prstatus = XNEWVEC (gdb_prstatus_t, nlwp + 1); |
c3f6f71d | 2735 | |
b8c9b27d | 2736 | old_chain = make_cleanup (xfree, prstatus); |
c3f6f71d JM |
2737 | if (ioctl (pi->ctl_fd, PIOCLSTATUS, prstatus) < 0) |
2738 | proc_error (pi, "update_threads (PIOCLSTATUS)", __LINE__); | |
2739 | ||
77382aee | 2740 | /* Skip element zero, which represents the process as a whole. */ |
c3f6f71d JM |
2741 | for (i = 1; i < nlwp + 1; i++) |
2742 | { | |
2743 | if ((thread = create_procinfo (pi->pid, prstatus[i].pr_who)) == NULL) | |
2744 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c5aa993b | 2745 | |
c3f6f71d JM |
2746 | memcpy (&thread->prstatus, &prstatus[i], sizeof (*prstatus)); |
2747 | thread->status_valid = 1; | |
2748 | } | |
2749 | pi->threads_valid = 1; | |
2750 | do_cleanups (old_chain); | |
2751 | return 1; | |
2752 | } | |
2753 | #else | |
2754 | #ifdef NEW_PROC_API | |
05b4bd79 | 2755 | /* Solaris 6 (and later) version. */ |
004527cb AC |
2756 | static void |
2757 | do_closedir_cleanup (void *dir) | |
2758 | { | |
2759 | closedir (dir); | |
2760 | } | |
2761 | ||
d3581e61 | 2762 | static int |
fba45db2 | 2763 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2764 | { |
2765 | char pathname[MAX_PROC_NAME_SIZE + 16]; | |
2766 | struct dirent *direntry; | |
2767 | struct cleanup *old_chain = NULL; | |
2768 | procinfo *thread; | |
2769 | DIR *dirp; | |
2770 | int lwpid; | |
2771 | ||
77382aee PA |
2772 | /* We should never have to apply this operation to any procinfo |
2773 | except the one for the main process. If that ever changes for | |
2774 | any reason, then take out the following clause and replace it | |
2775 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2776 | |
c3f6f71d JM |
2777 | if (pi->tid != 0) |
2778 | pi = find_procinfo_or_die (pi->pid, 0); | |
2779 | ||
2780 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2781 | ||
05b4bd79 PA |
2782 | /* Note: this brute-force method was originally devised for Unixware |
2783 | (support removed since), and will also work on Solaris 2.6 and | |
2784 | 2.7. The original comment mentioned the existence of a much | |
2785 | simpler and more elegant way to do this on Solaris, but didn't | |
2786 | point out what that was. */ | |
c3f6f71d JM |
2787 | |
2788 | strcpy (pathname, pi->pathname); | |
2789 | strcat (pathname, "/lwp"); | |
2790 | if ((dirp = opendir (pathname)) == NULL) | |
2791 | proc_error (pi, "update_threads, opendir", __LINE__); | |
2792 | ||
004527cb | 2793 | old_chain = make_cleanup (do_closedir_cleanup, dirp); |
c3f6f71d JM |
2794 | while ((direntry = readdir (dirp)) != NULL) |
2795 | if (direntry->d_name[0] != '.') /* skip '.' and '..' */ | |
2796 | { | |
2797 | lwpid = atoi (&direntry->d_name[0]); | |
2798 | if ((thread = create_procinfo (pi->pid, lwpid)) == NULL) | |
2799 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
2800 | } | |
2801 | pi->threads_valid = 1; | |
2802 | do_cleanups (old_chain); | |
2803 | return 1; | |
2804 | } | |
2805 | #else | |
2806 | #ifdef PIOCTLIST | |
77382aee | 2807 | /* OSF version */ |
d3581e61 | 2808 | static int |
fba45db2 | 2809 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2810 | { |
2811 | int nthreads, i; | |
2812 | tid_t *threads; | |
2813 | ||
77382aee PA |
2814 | /* We should never have to apply this operation to any procinfo |
2815 | except the one for the main process. If that ever changes for | |
2816 | any reason, then take out the following clause and replace it | |
2817 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2818 | |
c3f6f71d JM |
2819 | if (pi->tid != 0) |
2820 | pi = find_procinfo_or_die (pi->pid, 0); | |
2821 | ||
2822 | proc_iterate_over_threads (pi, proc_delete_dead_threads, NULL); | |
2823 | ||
2824 | nthreads = proc_get_nthreads (pi); | |
2825 | if (nthreads < 2) | |
0df8b418 | 2826 | return 0; /* Nothing to do for 1 or fewer threads. */ |
c3f6f71d | 2827 | |
8d749320 | 2828 | threads = XNEWVEC (tid_t, nthreads); |
19958708 | 2829 | |
c3f6f71d JM |
2830 | if (ioctl (pi->ctl_fd, PIOCTLIST, threads) < 0) |
2831 | proc_error (pi, "procfs: update_threads (PIOCTLIST)", __LINE__); | |
2832 | ||
2833 | for (i = 0; i < nthreads; i++) | |
2834 | { | |
2835 | if (!find_procinfo (pi->pid, threads[i])) | |
2836 | if (!create_procinfo (pi->pid, threads[i])) | |
2837 | proc_error (pi, "update_threads, create_procinfo", __LINE__); | |
c906108c | 2838 | } |
c3f6f71d JM |
2839 | pi->threads_valid = 1; |
2840 | return 1; | |
c906108c | 2841 | } |
c3f6f71d | 2842 | #else |
77382aee | 2843 | /* Default version */ |
d3581e61 | 2844 | static int |
fba45db2 | 2845 | proc_update_threads (procinfo *pi) |
c3f6f71d JM |
2846 | { |
2847 | return 0; | |
2848 | } | |
2849 | #endif /* OSF PIOCTLIST */ | |
2850 | #endif /* NEW_PROC_API */ | |
2851 | #endif /* SOL 2.5 PIOCLSTATUS */ | |
c906108c | 2852 | |
77382aee PA |
2853 | /* Given a pointer to a function, call that function once for each lwp |
2854 | in the procinfo list, until the function returns non-zero, in which | |
2855 | event return the value returned by the function. | |
2856 | ||
2857 | Note: this function does NOT call update_threads. If you want to | |
2858 | discover new threads first, you must call that function explicitly. | |
2859 | This function just makes a quick pass over the currently-known | |
2860 | procinfos. | |
2861 | ||
2862 | PI is the parent process procinfo. FUNC is the per-thread | |
2863 | function. PTR is an opaque parameter for function. Returns the | |
2864 | first non-zero return value from the callee, or zero. */ | |
c3f6f71d | 2865 | |
d3581e61 | 2866 | static int |
d0849a9a KB |
2867 | proc_iterate_over_threads (procinfo *pi, |
2868 | int (*func) (procinfo *, procinfo *, void *), | |
2869 | void *ptr) | |
c906108c | 2870 | { |
c3f6f71d JM |
2871 | procinfo *thread, *next; |
2872 | int retval = 0; | |
c906108c | 2873 | |
77382aee PA |
2874 | /* We should never have to apply this operation to any procinfo |
2875 | except the one for the main process. If that ever changes for | |
2876 | any reason, then take out the following clause and replace it | |
2877 | with one that makes sure the ctl_fd is open. */ | |
19958708 | 2878 | |
c3f6f71d JM |
2879 | if (pi->tid != 0) |
2880 | pi = find_procinfo_or_die (pi->pid, 0); | |
2881 | ||
2882 | for (thread = pi->thread_list; thread != NULL; thread = next) | |
c906108c | 2883 | { |
0df8b418 | 2884 | next = thread->next; /* In case thread is destroyed. */ |
c3f6f71d JM |
2885 | if ((retval = (*func) (pi, thread, ptr)) != 0) |
2886 | break; | |
c906108c | 2887 | } |
c3f6f71d JM |
2888 | |
2889 | return retval; | |
c906108c SS |
2890 | } |
2891 | ||
c3f6f71d JM |
2892 | /* =================== END, Thread "MODULE" =================== */ |
2893 | ||
2894 | /* =================== END, /proc "MODULE" =================== */ | |
2895 | ||
2896 | /* =================== GDB "MODULE" =================== */ | |
2897 | ||
77382aee PA |
2898 | /* Here are all of the gdb target vector functions and their |
2899 | friends. */ | |
c3f6f71d | 2900 | |
39f77062 | 2901 | static ptid_t do_attach (ptid_t ptid); |
a14ed312 | 2902 | static void do_detach (int signo); |
9185ddce | 2903 | static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, |
77382aee | 2904 | int entry_or_exit, int mode, int from_tty); |
9185ddce | 2905 | |
77382aee PA |
2906 | /* Sets up the inferior to be debugged. Registers to trace signals, |
2907 | hardware faults, and syscalls. Note: does not set RLC flag: caller | |
2908 | may want to customize that. Returns zero for success (note! | |
2909 | unlike most functions in this module); on failure, returns the LINE | |
2910 | NUMBER where it failed! */ | |
c3f6f71d JM |
2911 | |
2912 | static int | |
fba45db2 | 2913 | procfs_debug_inferior (procinfo *pi) |
c906108c | 2914 | { |
c3f6f71d | 2915 | fltset_t traced_faults; |
37de36c6 KB |
2916 | gdb_sigset_t traced_signals; |
2917 | sysset_t *traced_syscall_entries; | |
2918 | sysset_t *traced_syscall_exits; | |
2919 | int status; | |
c906108c | 2920 | |
0df8b418 MS |
2921 | /* Register to trace hardware faults in the child. */ |
2922 | prfillset (&traced_faults); /* trace all faults... */ | |
3c95f01c | 2923 | gdb_prdelset (&traced_faults, FLTPAGE); /* except page fault. */ |
c3f6f71d JM |
2924 | if (!proc_set_traced_faults (pi, &traced_faults)) |
2925 | return __LINE__; | |
c906108c | 2926 | |
2455069d UW |
2927 | /* Initially, register to trace all signals in the child. */ |
2928 | prfillset (&traced_signals); | |
2929 | if (!proc_set_traced_signals (pi, &traced_signals)) | |
c3f6f71d JM |
2930 | return __LINE__; |
2931 | ||
37de36c6 | 2932 | |
c3f6f71d | 2933 | /* Register to trace the 'exit' system call (on entry). */ |
37de36c6 KB |
2934 | traced_syscall_entries = sysset_t_alloc (pi); |
2935 | gdb_premptysysset (traced_syscall_entries); | |
2936 | #ifdef SYS_exit | |
2937 | gdb_praddsysset (traced_syscall_entries, SYS_exit); | |
2938 | #endif | |
c3f6f71d | 2939 | #ifdef SYS_lwpexit |
0df8b418 | 2940 | gdb_praddsysset (traced_syscall_entries, SYS_lwpexit);/* And _lwp_exit... */ |
c3f6f71d JM |
2941 | #endif |
2942 | #ifdef SYS_lwp_exit | |
37de36c6 KB |
2943 | gdb_praddsysset (traced_syscall_entries, SYS_lwp_exit); |
2944 | #endif | |
2945 | #ifdef DYNAMIC_SYSCALLS | |
2946 | { | |
2947 | int callnum = find_syscall (pi, "_exit"); | |
f4a14ae6 | 2948 | |
37de36c6 KB |
2949 | if (callnum >= 0) |
2950 | gdb_praddsysset (traced_syscall_entries, callnum); | |
2951 | } | |
c906108c SS |
2952 | #endif |
2953 | ||
37de36c6 KB |
2954 | status = proc_set_traced_sysentry (pi, traced_syscall_entries); |
2955 | xfree (traced_syscall_entries); | |
2956 | if (!status) | |
c3f6f71d JM |
2957 | return __LINE__; |
2958 | ||
2959 | #ifdef PRFS_STOPEXEC /* defined on OSF */ | |
2960 | /* OSF method for tracing exec syscalls. Quoting: | |
2961 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
2962 | exits from exec system calls because of the user level loader. */ | |
0df8b418 | 2963 | /* FIXME: make nice and maybe move into an access function. */ |
c3f6f71d JM |
2964 | { |
2965 | int prfs_flags; | |
2966 | ||
2967 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) | |
2968 | return __LINE__; | |
2969 | ||
2970 | prfs_flags |= PRFS_STOPEXEC; | |
2971 | ||
2972 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) | |
2973 | return __LINE__; | |
2974 | } | |
2975 | #else /* not PRFS_STOPEXEC */ | |
0df8b418 | 2976 | /* Everyone else's (except OSF) method for tracing exec syscalls. */ |
c3f6f71d JM |
2977 | /* GW: Rationale... |
2978 | Not all systems with /proc have all the exec* syscalls with the same | |
2979 | names. On the SGI, for example, there is no SYS_exec, but there | |
0df8b418 | 2980 | *is* a SYS_execv. So, we try to account for that. */ |
c3f6f71d | 2981 | |
37de36c6 KB |
2982 | traced_syscall_exits = sysset_t_alloc (pi); |
2983 | gdb_premptysysset (traced_syscall_exits); | |
c3f6f71d | 2984 | #ifdef SYS_exec |
37de36c6 | 2985 | gdb_praddsysset (traced_syscall_exits, SYS_exec); |
c3f6f71d JM |
2986 | #endif |
2987 | #ifdef SYS_execve | |
37de36c6 | 2988 | gdb_praddsysset (traced_syscall_exits, SYS_execve); |
c3f6f71d JM |
2989 | #endif |
2990 | #ifdef SYS_execv | |
37de36c6 | 2991 | gdb_praddsysset (traced_syscall_exits, SYS_execv); |
c3f6f71d | 2992 | #endif |
c5aa993b | 2993 | |
c3f6f71d | 2994 | #ifdef SYS_lwpcreate |
37de36c6 KB |
2995 | gdb_praddsysset (traced_syscall_exits, SYS_lwpcreate); |
2996 | gdb_praddsysset (traced_syscall_exits, SYS_lwpexit); | |
c906108c | 2997 | #endif |
c5aa993b | 2998 | |
0df8b418 | 2999 | #ifdef SYS_lwp_create /* FIXME: once only, please. */ |
37de36c6 KB |
3000 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_create); |
3001 | gdb_praddsysset (traced_syscall_exits, SYS_lwp_exit); | |
c3f6f71d | 3002 | #endif |
c5aa993b | 3003 | |
37de36c6 KB |
3004 | #ifdef DYNAMIC_SYSCALLS |
3005 | { | |
3006 | int callnum = find_syscall (pi, "execve"); | |
f4a14ae6 | 3007 | |
37de36c6 KB |
3008 | if (callnum >= 0) |
3009 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3010 | callnum = find_syscall (pi, "ra_execve"); | |
3011 | if (callnum >= 0) | |
3012 | gdb_praddsysset (traced_syscall_exits, callnum); | |
3013 | } | |
3014 | #endif | |
c906108c | 3015 | |
37de36c6 KB |
3016 | status = proc_set_traced_sysexit (pi, traced_syscall_exits); |
3017 | xfree (traced_syscall_exits); | |
3018 | if (!status) | |
c3f6f71d JM |
3019 | return __LINE__; |
3020 | ||
3021 | #endif /* PRFS_STOPEXEC */ | |
3022 | return 0; | |
c906108c SS |
3023 | } |
3024 | ||
19958708 | 3025 | static void |
c0939df1 | 3026 | procfs_attach (struct target_ops *ops, const char *args, int from_tty) |
c906108c | 3027 | { |
c3f6f71d JM |
3028 | char *exec_file; |
3029 | int pid; | |
3030 | ||
74164c56 | 3031 | pid = parse_pid_to_attach (args); |
c3f6f71d | 3032 | |
c3f6f71d | 3033 | if (pid == getpid ()) |
8a3fe4f8 | 3034 | error (_("Attaching GDB to itself is not a good idea...")); |
c906108c | 3035 | |
c3f6f71d | 3036 | if (from_tty) |
c906108c | 3037 | { |
c3f6f71d JM |
3038 | exec_file = get_exec_file (0); |
3039 | ||
3040 | if (exec_file) | |
a3f17187 | 3041 | printf_filtered (_("Attaching to program `%s', %s\n"), |
39f77062 | 3042 | exec_file, target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d | 3043 | else |
a3f17187 | 3044 | printf_filtered (_("Attaching to %s\n"), |
77382aee | 3045 | target_pid_to_str (pid_to_ptid (pid))); |
c3f6f71d JM |
3046 | |
3047 | fflush (stdout); | |
c906108c | 3048 | } |
39f77062 | 3049 | inferior_ptid = do_attach (pid_to_ptid (pid)); |
6a3cb8e8 PA |
3050 | if (!target_is_pushed (ops)) |
3051 | push_target (ops); | |
c3f6f71d JM |
3052 | } |
3053 | ||
19958708 | 3054 | static void |
52554a0e | 3055 | procfs_detach (struct target_ops *ops, const char *args, int from_tty) |
c3f6f71d | 3056 | { |
cc377e6b | 3057 | int sig = 0; |
dfd4cc63 | 3058 | int pid = ptid_get_pid (inferior_ptid); |
cc377e6b MK |
3059 | |
3060 | if (args) | |
3061 | sig = atoi (args); | |
c3f6f71d JM |
3062 | |
3063 | if (from_tty) | |
c906108c | 3064 | { |
cc377e6b MK |
3065 | char *exec_file; |
3066 | ||
c3f6f71d | 3067 | exec_file = get_exec_file (0); |
cc377e6b | 3068 | if (exec_file == NULL) |
c3f6f71d | 3069 | exec_file = ""; |
cc377e6b | 3070 | |
a3f17187 | 3071 | printf_filtered (_("Detaching from program: %s, %s\n"), exec_file, |
cc377e6b MK |
3072 | target_pid_to_str (pid_to_ptid (pid))); |
3073 | gdb_flush (gdb_stdout); | |
c906108c | 3074 | } |
19958708 | 3075 | |
cc377e6b MK |
3076 | do_detach (sig); |
3077 | ||
39f77062 | 3078 | inferior_ptid = null_ptid; |
7f9f62ba | 3079 | detach_inferior (pid); |
6a3cb8e8 | 3080 | inf_child_maybe_unpush_target (ops); |
c906108c SS |
3081 | } |
3082 | ||
39f77062 KB |
3083 | static ptid_t |
3084 | do_attach (ptid_t ptid) | |
c906108c | 3085 | { |
c3f6f71d | 3086 | procinfo *pi; |
181e7f93 | 3087 | struct inferior *inf; |
c3f6f71d | 3088 | int fail; |
2689673f | 3089 | int lwpid; |
c3f6f71d | 3090 | |
dfd4cc63 | 3091 | if ((pi = create_procinfo (ptid_get_pid (ptid), 0)) == NULL) |
8a3fe4f8 | 3092 | perror (_("procfs: out of memory in 'attach'")); |
c3f6f71d JM |
3093 | |
3094 | if (!open_procinfo_files (pi, FD_CTL)) | |
3095 | { | |
3096 | fprintf_filtered (gdb_stderr, "procfs:%d -- ", __LINE__); | |
19958708 | 3097 | sprintf (errmsg, "do_attach: couldn't open /proc file for process %d", |
dfd4cc63 | 3098 | ptid_get_pid (ptid)); |
c3f6f71d JM |
3099 | dead_procinfo (pi, errmsg, NOKILL); |
3100 | } | |
c906108c | 3101 | |
c3f6f71d JM |
3102 | /* Stop the process (if it isn't already stopped). */ |
3103 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) | |
c906108c | 3104 | { |
c3f6f71d JM |
3105 | pi->was_stopped = 1; |
3106 | proc_prettyprint_why (proc_why (pi), proc_what (pi), 1); | |
c906108c SS |
3107 | } |
3108 | else | |
3109 | { | |
c3f6f71d JM |
3110 | pi->was_stopped = 0; |
3111 | /* Set the process to run again when we close it. */ | |
3112 | if (!proc_set_run_on_last_close (pi)) | |
3113 | dead_procinfo (pi, "do_attach: couldn't set RLC.", NOKILL); | |
3114 | ||
0df8b418 | 3115 | /* Now stop the process. */ |
c3f6f71d JM |
3116 | if (!proc_stop_process (pi)) |
3117 | dead_procinfo (pi, "do_attach: couldn't stop the process.", NOKILL); | |
3118 | pi->ignore_next_sigstop = 1; | |
c906108c | 3119 | } |
c3f6f71d JM |
3120 | /* Save some of the /proc state to be restored if we detach. */ |
3121 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
3122 | dead_procinfo (pi, "do_attach: couldn't save traced faults.", NOKILL); | |
3123 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) | |
3124 | dead_procinfo (pi, "do_attach: couldn't save traced signals.", NOKILL); | |
37de36c6 | 3125 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3126 | dead_procinfo (pi, "do_attach: couldn't save traced syscall entries.", |
3127 | NOKILL); | |
37de36c6 | 3128 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
19958708 | 3129 | dead_procinfo (pi, "do_attach: couldn't save traced syscall exits.", |
c3f6f71d JM |
3130 | NOKILL); |
3131 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
3132 | dead_procinfo (pi, "do_attach: couldn't save held signals.", NOKILL); | |
3133 | ||
3134 | if ((fail = procfs_debug_inferior (pi)) != 0) | |
3135 | dead_procinfo (pi, "do_attach: failed in procfs_debug_inferior", NOKILL); | |
3136 | ||
6c95b8df PA |
3137 | inf = current_inferior (); |
3138 | inferior_appeared (inf, pi->pid); | |
c3f6f71d | 3139 | /* Let GDB know that the inferior was attached. */ |
181e7f93 | 3140 | inf->attach_flag = 1; |
2689673f PA |
3141 | |
3142 | /* Create a procinfo for the current lwp. */ | |
3143 | lwpid = proc_get_current_thread (pi); | |
3144 | create_procinfo (pi->pid, lwpid); | |
3145 | ||
3146 | /* Add it to gdb's thread list. */ | |
dfd4cc63 | 3147 | ptid = ptid_build (pi->pid, lwpid, 0); |
2689673f PA |
3148 | add_thread (ptid); |
3149 | ||
3150 | return ptid; | |
c906108c SS |
3151 | } |
3152 | ||
3153 | static void | |
fba45db2 | 3154 | do_detach (int signo) |
c906108c | 3155 | { |
c3f6f71d | 3156 | procinfo *pi; |
c906108c | 3157 | |
0df8b418 | 3158 | /* Find procinfo for the main process. */ |
dfd4cc63 LM |
3159 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), |
3160 | 0); /* FIXME: threads */ | |
c3f6f71d JM |
3161 | if (signo) |
3162 | if (!proc_set_current_signal (pi, signo)) | |
3163 | proc_warn (pi, "do_detach, set_current_signal", __LINE__); | |
c5aa993b | 3164 | |
c3f6f71d JM |
3165 | if (!proc_set_traced_signals (pi, &pi->saved_sigset)) |
3166 | proc_warn (pi, "do_detach, set_traced_signal", __LINE__); | |
c906108c | 3167 | |
c3f6f71d JM |
3168 | if (!proc_set_traced_faults (pi, &pi->saved_fltset)) |
3169 | proc_warn (pi, "do_detach, set_traced_faults", __LINE__); | |
3170 | ||
37de36c6 | 3171 | if (!proc_set_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d JM |
3172 | proc_warn (pi, "do_detach, set_traced_sysentry", __LINE__); |
3173 | ||
37de36c6 | 3174 | if (!proc_set_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
3175 | proc_warn (pi, "do_detach, set_traced_sysexit", __LINE__); |
3176 | ||
3177 | if (!proc_set_held_signals (pi, &pi->saved_sighold)) | |
3178 | proc_warn (pi, "do_detach, set_held_signals", __LINE__); | |
3179 | ||
3180 | if (signo || (proc_flags (pi) & (PR_STOPPED | PR_ISTOP))) | |
3181 | if (signo || !(pi->was_stopped) || | |
e2e0b3e5 | 3182 | query (_("Was stopped when attached, make it runnable again? "))) |
c3f6f71d JM |
3183 | { |
3184 | /* Clear any pending signal. */ | |
3185 | if (!proc_clear_current_fault (pi)) | |
3186 | proc_warn (pi, "do_detach, clear_current_fault", __LINE__); | |
3187 | ||
1a303dec MS |
3188 | if (signo == 0 && !proc_clear_current_signal (pi)) |
3189 | proc_warn (pi, "do_detach, clear_current_signal", __LINE__); | |
3190 | ||
c3f6f71d JM |
3191 | if (!proc_set_run_on_last_close (pi)) |
3192 | proc_warn (pi, "do_detach, set_rlc", __LINE__); | |
3193 | } | |
3194 | ||
c3f6f71d | 3195 | destroy_procinfo (pi); |
c906108c SS |
3196 | } |
3197 | ||
772cf8be MK |
3198 | /* Fetch register REGNUM from the inferior. If REGNUM is -1, do this |
3199 | for all registers. | |
3200 | ||
3201 | ??? Is the following note still relevant? We can't get individual | |
3202 | registers with the PT_GETREGS ptrace(2) request either, yet we | |
3203 | don't bother with caching at all in that case. | |
3204 | ||
3205 | NOTE: Since the /proc interface cannot give us individual | |
3206 | registers, we pay no attention to REGNUM, and just fetch them all. | |
3207 | This results in the possibility that we will do unnecessarily many | |
3208 | fetches, since we may be called repeatedly for individual | |
3209 | registers. So we cache the results, and mark the cache invalid | |
3210 | when the process is resumed. */ | |
c3f6f71d | 3211 | |
c906108c | 3212 | static void |
28439f5e PA |
3213 | procfs_fetch_registers (struct target_ops *ops, |
3214 | struct regcache *regcache, int regnum) | |
c906108c | 3215 | { |
772cf8be MK |
3216 | gdb_gregset_t *gregs; |
3217 | procinfo *pi; | |
dfd4cc63 LM |
3218 | int pid = ptid_get_pid (inferior_ptid); |
3219 | int tid = ptid_get_lwp (inferior_ptid); | |
40a6adc1 | 3220 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3221 | |
2689673f | 3222 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3223 | |
3224 | if (pi == NULL) | |
8a3fe4f8 | 3225 | error (_("procfs: fetch_registers failed to find procinfo for %s"), |
39f77062 | 3226 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 3227 | |
772cf8be MK |
3228 | gregs = proc_get_gregs (pi); |
3229 | if (gregs == NULL) | |
c3f6f71d JM |
3230 | proc_error (pi, "fetch_registers, get_gregs", __LINE__); |
3231 | ||
56be3814 | 3232 | supply_gregset (regcache, (const gdb_gregset_t *) gregs); |
c3f6f71d | 3233 | |
40a6adc1 | 3234 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3235 | { |
772cf8be MK |
3236 | gdb_fpregset_t *fpregs; |
3237 | ||
40a6adc1 MD |
3238 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3239 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3240 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3241 | return; /* Not a floating point register. */ |
c5aa993b | 3242 | |
772cf8be MK |
3243 | fpregs = proc_get_fpregs (pi); |
3244 | if (fpregs == NULL) | |
60054393 | 3245 | proc_error (pi, "fetch_registers, get_fpregs", __LINE__); |
c906108c | 3246 | |
56be3814 | 3247 | supply_fpregset (regcache, (const gdb_fpregset_t *) fpregs); |
60054393 | 3248 | } |
c906108c SS |
3249 | } |
3250 | ||
772cf8be MK |
3251 | /* Store register REGNUM back into the inferior. If REGNUM is -1, do |
3252 | this for all registers. | |
3253 | ||
3254 | NOTE: Since the /proc interface will not read individual registers, | |
3255 | we will cache these requests until the process is resumed, and only | |
3256 | then write them back to the inferior process. | |
77382aee | 3257 | |
772cf8be MK |
3258 | FIXME: is that a really bad idea? Have to think about cases where |
3259 | writing one register might affect the value of others, etc. */ | |
c906108c | 3260 | |
c3f6f71d | 3261 | static void |
28439f5e PA |
3262 | procfs_store_registers (struct target_ops *ops, |
3263 | struct regcache *regcache, int regnum) | |
c3f6f71d | 3264 | { |
772cf8be MK |
3265 | gdb_gregset_t *gregs; |
3266 | procinfo *pi; | |
dfd4cc63 LM |
3267 | int pid = ptid_get_pid (inferior_ptid); |
3268 | int tid = ptid_get_lwp (inferior_ptid); | |
40a6adc1 | 3269 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c3f6f71d | 3270 | |
2689673f | 3271 | pi = find_procinfo_or_die (pid, tid); |
c3f6f71d JM |
3272 | |
3273 | if (pi == NULL) | |
8a3fe4f8 | 3274 | error (_("procfs: store_registers: failed to find procinfo for %s"), |
39f77062 | 3275 | target_pid_to_str (inferior_ptid)); |
c906108c | 3276 | |
772cf8be MK |
3277 | gregs = proc_get_gregs (pi); |
3278 | if (gregs == NULL) | |
c3f6f71d | 3279 | proc_error (pi, "store_registers, get_gregs", __LINE__); |
c906108c | 3280 | |
56be3814 | 3281 | fill_gregset (regcache, gregs, regnum); |
c3f6f71d JM |
3282 | if (!proc_set_gregs (pi)) |
3283 | proc_error (pi, "store_registers, set_gregs", __LINE__); | |
c906108c | 3284 | |
40a6adc1 | 3285 | if (gdbarch_fp0_regnum (gdbarch) >= 0) /* Do we have an FPU? */ |
60054393 | 3286 | { |
772cf8be MK |
3287 | gdb_fpregset_t *fpregs; |
3288 | ||
40a6adc1 MD |
3289 | if ((regnum >= 0 && regnum < gdbarch_fp0_regnum (gdbarch)) |
3290 | || regnum == gdbarch_pc_regnum (gdbarch) | |
3291 | || regnum == gdbarch_sp_regnum (gdbarch)) | |
772cf8be | 3292 | return; /* Not a floating point register. */ |
60054393 | 3293 | |
772cf8be MK |
3294 | fpregs = proc_get_fpregs (pi); |
3295 | if (fpregs == NULL) | |
60054393 MS |
3296 | proc_error (pi, "store_registers, get_fpregs", __LINE__); |
3297 | ||
56be3814 | 3298 | fill_fpregset (regcache, fpregs, regnum); |
60054393 MS |
3299 | if (!proc_set_fpregs (pi)) |
3300 | proc_error (pi, "store_registers, set_fpregs", __LINE__); | |
3301 | } | |
c3f6f71d | 3302 | } |
c906108c | 3303 | |
37de36c6 KB |
3304 | static int |
3305 | syscall_is_lwp_exit (procinfo *pi, int scall) | |
3306 | { | |
37de36c6 KB |
3307 | #ifdef SYS_lwp_exit |
3308 | if (scall == SYS_lwp_exit) | |
3309 | return 1; | |
3310 | #endif | |
3311 | #ifdef SYS_lwpexit | |
3312 | if (scall == SYS_lwpexit) | |
3313 | return 1; | |
3314 | #endif | |
3315 | return 0; | |
3316 | } | |
3317 | ||
3318 | static int | |
3319 | syscall_is_exit (procinfo *pi, int scall) | |
3320 | { | |
3321 | #ifdef SYS_exit | |
3322 | if (scall == SYS_exit) | |
3323 | return 1; | |
3324 | #endif | |
3325 | #ifdef DYNAMIC_SYSCALLS | |
3326 | if (find_syscall (pi, "_exit") == scall) | |
3327 | return 1; | |
3328 | #endif | |
3329 | return 0; | |
3330 | } | |
3331 | ||
3332 | static int | |
3333 | syscall_is_exec (procinfo *pi, int scall) | |
3334 | { | |
3335 | #ifdef SYS_exec | |
3336 | if (scall == SYS_exec) | |
3337 | return 1; | |
3338 | #endif | |
3339 | #ifdef SYS_execv | |
3340 | if (scall == SYS_execv) | |
3341 | return 1; | |
3342 | #endif | |
3343 | #ifdef SYS_execve | |
3344 | if (scall == SYS_execve) | |
3345 | return 1; | |
3346 | #endif | |
3347 | #ifdef DYNAMIC_SYSCALLS | |
3348 | if (find_syscall (pi, "_execve")) | |
3349 | return 1; | |
3350 | if (find_syscall (pi, "ra_execve")) | |
3351 | return 1; | |
3352 | #endif | |
3353 | return 0; | |
3354 | } | |
3355 | ||
3356 | static int | |
3357 | syscall_is_lwp_create (procinfo *pi, int scall) | |
3358 | { | |
3359 | #ifdef SYS_lwp_create | |
3360 | if (scall == SYS_lwp_create) | |
3361 | return 1; | |
3362 | #endif | |
3363 | #ifdef SYS_lwpcreate | |
3364 | if (scall == SYS_lwpcreate) | |
3365 | return 1; | |
3366 | #endif | |
3367 | return 0; | |
3368 | } | |
3369 | ||
7434dadd JB |
3370 | #ifdef SYS_syssgi |
3371 | /* Return the address of the __dbx_link() function in the file | |
3372 | refernced by ABFD by scanning its symbol table. Return 0 if | |
3373 | the symbol was not found. */ | |
3374 | ||
3375 | static CORE_ADDR | |
3376 | dbx_link_addr (bfd *abfd) | |
3377 | { | |
3378 | long storage_needed; | |
3379 | asymbol **symbol_table; | |
3380 | long number_of_symbols; | |
3381 | long i; | |
3382 | ||
3383 | storage_needed = bfd_get_symtab_upper_bound (abfd); | |
3384 | if (storage_needed <= 0) | |
3385 | return 0; | |
3386 | ||
3387 | symbol_table = (asymbol **) xmalloc (storage_needed); | |
3388 | make_cleanup (xfree, symbol_table); | |
3389 | ||
3390 | number_of_symbols = bfd_canonicalize_symtab (abfd, symbol_table); | |
3391 | ||
3392 | for (i = 0; i < number_of_symbols; i++) | |
3393 | { | |
3394 | asymbol *sym = symbol_table[i]; | |
3395 | ||
3396 | if ((sym->flags & BSF_GLOBAL) | |
77382aee PA |
3397 | && sym->name != NULL && strcmp (sym->name, "__dbx_link") == 0) |
3398 | return (sym->value + sym->section->vma); | |
7434dadd JB |
3399 | } |
3400 | ||
3401 | /* Symbol not found, return NULL. */ | |
3402 | return 0; | |
3403 | } | |
3404 | ||
3405 | /* Search the symbol table of the file referenced by FD for a symbol | |
0df8b418 | 3406 | named __dbx_link(). If found, then insert a breakpoint at this location, |
7434dadd JB |
3407 | and return nonzero. Return zero otherwise. */ |
3408 | ||
3409 | static int | |
3410 | insert_dbx_link_bpt_in_file (int fd, CORE_ADDR ignored) | |
3411 | { | |
3412 | bfd *abfd; | |
3413 | long storage_needed; | |
3414 | CORE_ADDR sym_addr; | |
3415 | ||
64c31149 | 3416 | abfd = gdb_bfd_fdopenr ("unamed", 0, fd); |
7434dadd JB |
3417 | if (abfd == NULL) |
3418 | { | |
3419 | warning (_("Failed to create a bfd: %s."), bfd_errmsg (bfd_get_error ())); | |
3420 | return 0; | |
3421 | } | |
3422 | ||
3423 | if (!bfd_check_format (abfd, bfd_object)) | |
3424 | { | |
3425 | /* Not the correct format, so we can not possibly find the dbx_link | |
77382aee | 3426 | symbol in it. */ |
cbb099e8 | 3427 | gdb_bfd_unref (abfd); |
7434dadd JB |
3428 | return 0; |
3429 | } | |
3430 | ||
3431 | sym_addr = dbx_link_addr (abfd); | |
3432 | if (sym_addr != 0) | |
3433 | { | |
f37f681c PA |
3434 | struct breakpoint *dbx_link_bpt; |
3435 | ||
7434dadd | 3436 | /* Insert the breakpoint. */ |
f37f681c PA |
3437 | dbx_link_bpt |
3438 | = create_and_insert_solib_event_breakpoint (target_gdbarch (), | |
3439 | sym_addr); | |
7434dadd | 3440 | if (dbx_link_bpt == NULL) |
77382aee PA |
3441 | { |
3442 | warning (_("Failed to insert dbx_link breakpoint.")); | |
cbb099e8 | 3443 | gdb_bfd_unref (abfd); |
77382aee PA |
3444 | return 0; |
3445 | } | |
cbb099e8 | 3446 | gdb_bfd_unref (abfd); |
7434dadd JB |
3447 | return 1; |
3448 | } | |
3449 | ||
cbb099e8 | 3450 | gdb_bfd_unref (abfd); |
7434dadd JB |
3451 | return 0; |
3452 | } | |
3453 | ||
e294797a | 3454 | /* Calls the supplied callback function once for each mapped address |
77382aee PA |
3455 | space in the process. The callback function receives an open file |
3456 | descriptor for the file corresponding to that mapped address space | |
3457 | (if there is one), and the base address of the mapped space. Quit | |
3458 | when the callback function returns a nonzero value, or at teh end | |
3459 | of the mappings. Returns the first non-zero return value of the | |
3460 | callback function, or zero. */ | |
e294797a JB |
3461 | |
3462 | static int | |
3463 | solib_mappings_callback (struct prmap *map, int (*func) (int, CORE_ADDR), | |
3464 | void *data) | |
3465 | { | |
3466 | procinfo *pi = data; | |
3467 | int fd; | |
3468 | ||
3469 | #ifdef NEW_PROC_API | |
3470 | char name[MAX_PROC_NAME_SIZE + sizeof (map->pr_mapname)]; | |
3471 | ||
3472 | if (map->pr_vaddr == 0 && map->pr_size == 0) | |
3473 | return -1; /* sanity */ | |
3474 | ||
3475 | if (map->pr_mapname[0] == 0) | |
3476 | { | |
3477 | fd = -1; /* no map file */ | |
3478 | } | |
3479 | else | |
3480 | { | |
3481 | sprintf (name, "/proc/%d/object/%s", pi->pid, map->pr_mapname); | |
3482 | /* Note: caller's responsibility to close this fd! */ | |
3483 | fd = open_with_retry (name, O_RDONLY); | |
3484 | /* Note: we don't test the above call for failure; | |
3485 | we just pass the FD on as given. Sometimes there is | |
3486 | no file, so the open may return failure, but that's | |
3487 | not a problem. */ | |
3488 | } | |
3489 | #else | |
3490 | fd = ioctl (pi->ctl_fd, PIOCOPENM, &map->pr_vaddr); | |
3491 | /* Note: we don't test the above call for failure; | |
3492 | we just pass the FD on as given. Sometimes there is | |
3493 | no file, so the ioctl may return failure, but that's | |
3494 | not a problem. */ | |
3495 | #endif | |
3496 | return (*func) (fd, (CORE_ADDR) map->pr_vaddr); | |
3497 | } | |
3498 | ||
7434dadd JB |
3499 | /* If the given memory region MAP contains a symbol named __dbx_link, |
3500 | insert a breakpoint at this location and return nonzero. Return | |
3501 | zero otherwise. */ | |
3502 | ||
3503 | static int | |
3504 | insert_dbx_link_bpt_in_region (struct prmap *map, | |
b8edc417 | 3505 | find_memory_region_ftype child_func, |
77382aee | 3506 | void *data) |
7434dadd JB |
3507 | { |
3508 | procinfo *pi = (procinfo *) data; | |
3509 | ||
3510 | /* We know the symbol we're looking for is in a text region, so | |
3511 | only look for it if the region is a text one. */ | |
3512 | if (map->pr_mflags & MA_EXEC) | |
3513 | return solib_mappings_callback (map, insert_dbx_link_bpt_in_file, pi); | |
3514 | ||
3515 | return 0; | |
3516 | } | |
3517 | ||
3518 | /* Search all memory regions for a symbol named __dbx_link. If found, | |
3519 | insert a breakpoint at its location, and return nonzero. Return zero | |
3520 | otherwise. */ | |
3521 | ||
3522 | static int | |
3523 | insert_dbx_link_breakpoint (procinfo *pi) | |
3524 | { | |
3525 | return iterate_over_mappings (pi, NULL, pi, insert_dbx_link_bpt_in_region); | |
3526 | } | |
3527 | #endif | |
3528 | ||
77382aee PA |
3529 | /* Retrieve the next stop event from the child process. If child has |
3530 | not stopped yet, wait for it to stop. Translate /proc eventcodes | |
3531 | (or possibly wait eventcodes) into gdb internal event codes. | |
3532 | Returns the id of process (and possibly thread) that incurred the | |
3533 | event. Event codes are returned through a pointer parameter. */ | |
c906108c | 3534 | |
39f77062 | 3535 | static ptid_t |
117de6a9 | 3536 | procfs_wait (struct target_ops *ops, |
4fcbb494 | 3537 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 3538 | { |
0df8b418 | 3539 | /* First cut: loosely based on original version 2.1. */ |
c3f6f71d | 3540 | procinfo *pi; |
39f77062 KB |
3541 | int wstat; |
3542 | int temp_tid; | |
3543 | ptid_t retval, temp_ptid; | |
c3f6f71d JM |
3544 | int why, what, flags; |
3545 | int retry = 0; | |
c906108c | 3546 | |
c3f6f71d | 3547 | wait_again: |
c906108c | 3548 | |
c3f6f71d JM |
3549 | retry++; |
3550 | wstat = 0; | |
39f77062 | 3551 | retval = pid_to_ptid (-1); |
c906108c | 3552 | |
0df8b418 | 3553 | /* Find procinfo for main process. */ |
dfd4cc63 | 3554 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d | 3555 | if (pi) |
c906108c | 3556 | { |
0df8b418 | 3557 | /* We must assume that the status is stale now... */ |
c3f6f71d JM |
3558 | pi->status_valid = 0; |
3559 | pi->gregs_valid = 0; | |
3560 | pi->fpregs_valid = 0; | |
3561 | ||
0df8b418 | 3562 | #if 0 /* just try this out... */ |
c3f6f71d JM |
3563 | flags = proc_flags (pi); |
3564 | why = proc_why (pi); | |
3565 | if ((flags & PR_STOPPED) && (why == PR_REQUESTED)) | |
0df8b418 | 3566 | pi->status_valid = 0; /* re-read again, IMMEDIATELY... */ |
c3f6f71d JM |
3567 | #endif |
3568 | /* If child is not stopped, wait for it to stop. */ | |
3569 | if (!(proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) && | |
3570 | !proc_wait_for_stop (pi)) | |
c906108c | 3571 | { |
0df8b418 | 3572 | /* wait_for_stop failed: has the child terminated? */ |
c3f6f71d | 3573 | if (errno == ENOENT) |
c906108c | 3574 | { |
39f77062 KB |
3575 | int wait_retval; |
3576 | ||
0df8b418 MS |
3577 | /* /proc file not found; presumably child has terminated. */ |
3578 | wait_retval = wait (&wstat); /* "wait" for the child's exit. */ | |
c3f6f71d | 3579 | |
dfd4cc63 LM |
3580 | /* Wrong child? */ |
3581 | if (wait_retval != ptid_get_pid (inferior_ptid)) | |
3e43a32a MS |
3582 | error (_("procfs: couldn't stop " |
3583 | "process %d: wait returned %d."), | |
dfd4cc63 | 3584 | ptid_get_pid (inferior_ptid), wait_retval); |
c3f6f71d | 3585 | /* FIXME: might I not just use waitpid? |
0df8b418 | 3586 | Or try find_procinfo to see if I know about this child? */ |
39f77062 | 3587 | retval = pid_to_ptid (wait_retval); |
c906108c | 3588 | } |
d1566ff5 FN |
3589 | else if (errno == EINTR) |
3590 | goto wait_again; | |
c3f6f71d | 3591 | else |
c906108c | 3592 | { |
0df8b418 | 3593 | /* Unknown error from wait_for_stop. */ |
c3f6f71d | 3594 | proc_error (pi, "target_wait (wait_for_stop)", __LINE__); |
c906108c | 3595 | } |
c3f6f71d JM |
3596 | } |
3597 | else | |
3598 | { | |
3599 | /* This long block is reached if either: | |
3600 | a) the child was already stopped, or | |
3601 | b) we successfully waited for the child with wait_for_stop. | |
3602 | This block will analyze the /proc status, and translate it | |
3603 | into a waitstatus for GDB. | |
3604 | ||
3605 | If we actually had to call wait because the /proc file | |
19958708 | 3606 | is gone (child terminated), then we skip this block, |
c3f6f71d JM |
3607 | because we already have a waitstatus. */ |
3608 | ||
3609 | flags = proc_flags (pi); | |
3610 | why = proc_why (pi); | |
3611 | what = proc_what (pi); | |
3612 | ||
c3f6f71d | 3613 | if (flags & (PR_STOPPED | PR_ISTOP)) |
c906108c | 3614 | { |
c3f6f71d JM |
3615 | #ifdef PR_ASYNC |
3616 | /* If it's running async (for single_thread control), | |
3617 | set it back to normal again. */ | |
3618 | if (flags & PR_ASYNC) | |
3619 | if (!proc_unset_async (pi)) | |
3620 | proc_error (pi, "target_wait, unset_async", __LINE__); | |
3621 | #endif | |
3622 | ||
3623 | if (info_verbose) | |
3624 | proc_prettyprint_why (why, what, 1); | |
3625 | ||
3626 | /* The 'pid' we will return to GDB is composed of | |
3627 | the process ID plus the lwp ID. */ | |
dfd4cc63 | 3628 | retval = ptid_build (pi->pid, proc_get_current_thread (pi), 0); |
c3f6f71d JM |
3629 | |
3630 | switch (why) { | |
3631 | case PR_SIGNALLED: | |
3632 | wstat = (what << 8) | 0177; | |
3633 | break; | |
3634 | case PR_SYSENTRY: | |
37de36c6 | 3635 | if (syscall_is_lwp_exit (pi, what)) |
c3f6f71d | 3636 | { |
17faa917 DJ |
3637 | if (print_thread_events) |
3638 | printf_unfiltered (_("[%s exited]\n"), | |
3639 | target_pid_to_str (retval)); | |
37de36c6 KB |
3640 | delete_thread (retval); |
3641 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3642 | return retval; | |
3643 | } | |
3644 | else if (syscall_is_exit (pi, what)) | |
3645 | { | |
181e7f93 PA |
3646 | struct inferior *inf; |
3647 | ||
0df8b418 | 3648 | /* Handle SYS_exit call only. */ |
37de36c6 | 3649 | /* Stopped at entry to SYS_exit. |
19958708 | 3650 | Make it runnable, resume it, then use |
37de36c6 | 3651 | the wait system call to get its exit code. |
19958708 | 3652 | Proc_run_process always clears the current |
37de36c6 KB |
3653 | fault and signal. |
3654 | Then return its exit status. */ | |
3655 | pi->status_valid = 0; | |
3656 | wstat = 0; | |
19958708 | 3657 | /* FIXME: what we should do is return |
37de36c6 KB |
3658 | TARGET_WAITKIND_SPURIOUS. */ |
3659 | if (!proc_run_process (pi, 0, 0)) | |
3660 | proc_error (pi, "target_wait, run_process", __LINE__); | |
181e7f93 PA |
3661 | |
3662 | inf = find_inferior_pid (pi->pid); | |
3663 | if (inf->attach_flag) | |
c3f6f71d | 3664 | { |
19958708 | 3665 | /* Don't call wait: simulate waiting for exit, |
37de36c6 KB |
3666 | return a "success" exit code. Bogus: what if |
3667 | it returns something else? */ | |
3668 | wstat = 0; | |
39f77062 | 3669 | retval = inferior_ptid; /* ? ? ? */ |
37de36c6 KB |
3670 | } |
3671 | else | |
3672 | { | |
3673 | int temp = wait (&wstat); | |
3674 | ||
3675 | /* FIXME: shouldn't I make sure I get the right | |
3676 | event from the right process? If (for | |
3677 | instance) I have killed an earlier inferior | |
3678 | process but failed to clean up after it | |
3679 | somehow, I could get its termination event | |
3680 | here. */ | |
3681 | ||
0df8b418 MS |
3682 | /* If wait returns -1, that's what we return |
3683 | to GDB. */ | |
37de36c6 | 3684 | if (temp < 0) |
39f77062 | 3685 | retval = pid_to_ptid (temp); |
c3f6f71d | 3686 | } |
c3f6f71d | 3687 | } |
37de36c6 KB |
3688 | else |
3689 | { | |
a3f17187 | 3690 | printf_filtered (_("procfs: trapped on entry to ")); |
37de36c6 KB |
3691 | proc_prettyprint_syscall (proc_what (pi), 0); |
3692 | printf_filtered ("\n"); | |
3693 | #ifndef PIOCSSPCACT | |
c3f6f71d | 3694 | { |
37de36c6 | 3695 | long i, nsysargs, *sysargs; |
c3f6f71d | 3696 | |
37de36c6 KB |
3697 | if ((nsysargs = proc_nsysarg (pi)) > 0 && |
3698 | (sysargs = proc_sysargs (pi)) != NULL) | |
3699 | { | |
3e43a32a MS |
3700 | printf_filtered (_("%ld syscall arguments:\n"), |
3701 | nsysargs); | |
37de36c6 | 3702 | for (i = 0; i < nsysargs; i++) |
19958708 | 3703 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
3704 | i, sysargs[i]); |
3705 | } | |
c3f6f71d | 3706 | |
c3f6f71d | 3707 | } |
c3f6f71d | 3708 | #endif |
37de36c6 KB |
3709 | if (status) |
3710 | { | |
0df8b418 MS |
3711 | /* How to exit gracefully, returning "unknown |
3712 | event". */ | |
37de36c6 | 3713 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 3714 | return inferior_ptid; |
37de36c6 KB |
3715 | } |
3716 | else | |
3717 | { | |
3718 | /* How to keep going without returning to wfi: */ | |
a493e3e2 | 3719 | target_resume (ptid, 0, GDB_SIGNAL_0); |
37de36c6 KB |
3720 | goto wait_again; |
3721 | } | |
3722 | } | |
3723 | break; | |
3724 | case PR_SYSEXIT: | |
3725 | if (syscall_is_exec (pi, what)) | |
c3f6f71d | 3726 | { |
37de36c6 KB |
3727 | /* Hopefully this is our own "fork-child" execing |
3728 | the real child. Hoax this event into a trap, and | |
3729 | GDB will see the child about to execute its start | |
0df8b418 | 3730 | address. */ |
37de36c6 KB |
3731 | wstat = (SIGTRAP << 8) | 0177; |
3732 | } | |
9185ddce | 3733 | #ifdef SYS_syssgi |
77382aee PA |
3734 | else if (what == SYS_syssgi) |
3735 | { | |
3736 | /* see if we can break on dbx_link(). If yes, then | |
3737 | we no longer need the SYS_syssgi notifications. */ | |
3738 | if (insert_dbx_link_breakpoint (pi)) | |
3739 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, | |
3740 | FLAG_RESET, 0); | |
3741 | ||
3742 | /* This is an internal event and should be transparent | |
3743 | to wfi, so resume the execution and wait again. See | |
3744 | comment in procfs_init_inferior() for more details. */ | |
a493e3e2 | 3745 | target_resume (ptid, 0, GDB_SIGNAL_0); |
77382aee PA |
3746 | goto wait_again; |
3747 | } | |
9185ddce | 3748 | #endif |
37de36c6 KB |
3749 | else if (syscall_is_lwp_create (pi, what)) |
3750 | { | |
77382aee PA |
3751 | /* This syscall is somewhat like fork/exec. We |
3752 | will get the event twice: once for the parent | |
3753 | LWP, and once for the child. We should already | |
3754 | know about the parent LWP, but the child will | |
3755 | be new to us. So, whenever we get this event, | |
3756 | if it represents a new thread, simply add the | |
3757 | thread to the list. */ | |
c3f6f71d | 3758 | |
37de36c6 | 3759 | /* If not in procinfo list, add it. */ |
39f77062 KB |
3760 | temp_tid = proc_get_current_thread (pi); |
3761 | if (!find_procinfo (pi->pid, temp_tid)) | |
3762 | create_procinfo (pi->pid, temp_tid); | |
37de36c6 | 3763 | |
dfd4cc63 | 3764 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
37de36c6 | 3765 | /* If not in GDB's thread list, add it. */ |
39f77062 | 3766 | if (!in_thread_list (temp_ptid)) |
93815fbf VP |
3767 | add_thread (temp_ptid); |
3768 | ||
0df8b418 | 3769 | /* Return to WFI, but tell it to immediately resume. */ |
37de36c6 | 3770 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 3771 | return inferior_ptid; |
37de36c6 KB |
3772 | } |
3773 | else if (syscall_is_lwp_exit (pi, what)) | |
3774 | { | |
17faa917 DJ |
3775 | if (print_thread_events) |
3776 | printf_unfiltered (_("[%s exited]\n"), | |
3777 | target_pid_to_str (retval)); | |
37de36c6 KB |
3778 | delete_thread (retval); |
3779 | status->kind = TARGET_WAITKIND_SPURIOUS; | |
3780 | return retval; | |
c3f6f71d | 3781 | } |
37de36c6 KB |
3782 | else if (0) |
3783 | { | |
3784 | /* FIXME: Do we need to handle SYS_sproc, | |
3785 | SYS_fork, or SYS_vfork here? The old procfs | |
3786 | seemed to use this event to handle threads on | |
3787 | older (non-LWP) systems, where I'm assuming | |
19958708 | 3788 | that threads were actually separate processes. |
37de36c6 KB |
3789 | Irix, maybe? Anyway, low priority for now. */ |
3790 | } | |
3791 | else | |
3792 | { | |
a3f17187 | 3793 | printf_filtered (_("procfs: trapped on exit from ")); |
37de36c6 KB |
3794 | proc_prettyprint_syscall (proc_what (pi), 0); |
3795 | printf_filtered ("\n"); | |
3796 | #ifndef PIOCSSPCACT | |
3797 | { | |
3798 | long i, nsysargs, *sysargs; | |
3799 | ||
3800 | if ((nsysargs = proc_nsysarg (pi)) > 0 && | |
3801 | (sysargs = proc_sysargs (pi)) != NULL) | |
3802 | { | |
77382aee PA |
3803 | printf_filtered (_("%ld syscall arguments:\n"), |
3804 | nsysargs); | |
37de36c6 | 3805 | for (i = 0; i < nsysargs; i++) |
19958708 | 3806 | printf_filtered ("#%ld: 0x%08lx\n", |
37de36c6 KB |
3807 | i, sysargs[i]); |
3808 | } | |
3809 | } | |
c3f6f71d | 3810 | #endif |
37de36c6 | 3811 | status->kind = TARGET_WAITKIND_SPURIOUS; |
39f77062 | 3812 | return inferior_ptid; |
37de36c6 | 3813 | } |
c3f6f71d JM |
3814 | break; |
3815 | case PR_REQUESTED: | |
3816 | #if 0 /* FIXME */ | |
3817 | wstat = (SIGSTOP << 8) | 0177; | |
3818 | break; | |
3819 | #else | |
3820 | if (retry < 5) | |
3821 | { | |
a3f17187 | 3822 | printf_filtered (_("Retry #%d:\n"), retry); |
c3f6f71d JM |
3823 | pi->status_valid = 0; |
3824 | goto wait_again; | |
3825 | } | |
3826 | else | |
3827 | { | |
3828 | /* If not in procinfo list, add it. */ | |
39f77062 KB |
3829 | temp_tid = proc_get_current_thread (pi); |
3830 | if (!find_procinfo (pi->pid, temp_tid)) | |
3831 | create_procinfo (pi->pid, temp_tid); | |
c3f6f71d JM |
3832 | |
3833 | /* If not in GDB's thread list, add it. */ | |
dfd4cc63 | 3834 | temp_ptid = ptid_build (pi->pid, temp_tid, 0); |
39f77062 | 3835 | if (!in_thread_list (temp_ptid)) |
93815fbf | 3836 | add_thread (temp_ptid); |
c3f6f71d JM |
3837 | |
3838 | status->kind = TARGET_WAITKIND_STOPPED; | |
3839 | status->value.sig = 0; | |
3840 | return retval; | |
3841 | } | |
3842 | #endif | |
3843 | case PR_JOBCONTROL: | |
3844 | wstat = (what << 8) | 0177; | |
3845 | break; | |
3846 | case PR_FAULTED: | |
7af6341f | 3847 | switch (what) { |
c3f6f71d JM |
3848 | #ifdef FLTWATCH |
3849 | case FLTWATCH: | |
3850 | wstat = (SIGTRAP << 8) | 0177; | |
3851 | break; | |
3852 | #endif | |
3853 | #ifdef FLTKWATCH | |
3854 | case FLTKWATCH: | |
3855 | wstat = (SIGTRAP << 8) | 0177; | |
3856 | break; | |
3857 | #endif | |
0df8b418 | 3858 | /* FIXME: use si_signo where possible. */ |
c3f6f71d | 3859 | case FLTPRIV: |
0df8b418 | 3860 | #if (FLTILL != FLTPRIV) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3861 | case FLTILL: |
3862 | #endif | |
3863 | wstat = (SIGILL << 8) | 0177; | |
3864 | break; | |
3865 | case FLTBPT: | |
0df8b418 | 3866 | #if (FLTTRACE != FLTBPT) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3867 | case FLTTRACE: |
3868 | #endif | |
3869 | wstat = (SIGTRAP << 8) | 0177; | |
3870 | break; | |
3871 | case FLTSTACK: | |
3872 | case FLTACCESS: | |
0df8b418 | 3873 | #if (FLTBOUNDS != FLTSTACK) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3874 | case FLTBOUNDS: |
3875 | #endif | |
3876 | wstat = (SIGSEGV << 8) | 0177; | |
3877 | break; | |
3878 | case FLTIOVF: | |
3879 | case FLTIZDIV: | |
0df8b418 | 3880 | #if (FLTFPE != FLTIOVF) /* Avoid "duplicate case" error. */ |
c3f6f71d JM |
3881 | case FLTFPE: |
3882 | #endif | |
3883 | wstat = (SIGFPE << 8) | 0177; | |
3884 | break; | |
3e43a32a | 3885 | case FLTPAGE: /* Recoverable page fault */ |
0df8b418 MS |
3886 | default: /* FIXME: use si_signo if possible for |
3887 | fault. */ | |
39f77062 | 3888 | retval = pid_to_ptid (-1); |
c3f6f71d | 3889 | printf_filtered ("procfs:%d -- ", __LINE__); |
a3f17187 | 3890 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 3891 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 3892 | error (_("... giving up...")); |
c3f6f71d JM |
3893 | break; |
3894 | } | |
3895 | break; /* case PR_FAULTED: */ | |
3896 | default: /* switch (why) unmatched */ | |
3897 | printf_filtered ("procfs:%d -- ", __LINE__); | |
a3f17187 | 3898 | printf_filtered (_("child stopped for unknown reason:\n")); |
c3f6f71d | 3899 | proc_prettyprint_why (why, what, 1); |
8a3fe4f8 | 3900 | error (_("... giving up...")); |
c3f6f71d JM |
3901 | break; |
3902 | } | |
77382aee PA |
3903 | /* Got this far without error: If retval isn't in the |
3904 | threads database, add it. */ | |
dfd4cc63 | 3905 | if (ptid_get_pid (retval) > 0 && |
39f77062 | 3906 | !ptid_equal (retval, inferior_ptid) && |
c3f6f71d | 3907 | !in_thread_list (retval)) |
c906108c | 3908 | { |
77382aee PA |
3909 | /* We have a new thread. We need to add it both to |
3910 | GDB's list and to our own. If we don't create a | |
3911 | procinfo, resume may be unhappy later. */ | |
c3f6f71d | 3912 | add_thread (retval); |
dfd4cc63 LM |
3913 | if (find_procinfo (ptid_get_pid (retval), |
3914 | ptid_get_lwp (retval)) == NULL) | |
3915 | create_procinfo (ptid_get_pid (retval), | |
3916 | ptid_get_lwp (retval)); | |
c906108c | 3917 | } |
c906108c | 3918 | } |
0df8b418 | 3919 | else /* Flags do not indicate STOPPED. */ |
c906108c | 3920 | { |
0df8b418 | 3921 | /* surely this can't happen... */ |
c3f6f71d JM |
3922 | printf_filtered ("procfs:%d -- process not stopped.\n", |
3923 | __LINE__); | |
3924 | proc_prettyprint_flags (flags, 1); | |
8a3fe4f8 | 3925 | error (_("procfs: ...giving up...")); |
c906108c | 3926 | } |
c906108c | 3927 | } |
c906108c | 3928 | |
c3f6f71d JM |
3929 | if (status) |
3930 | store_waitstatus (status, wstat); | |
c906108c SS |
3931 | } |
3932 | ||
c3f6f71d JM |
3933 | return retval; |
3934 | } | |
c906108c | 3935 | |
4e73f23d RM |
3936 | /* Perform a partial transfer to/from the specified object. For |
3937 | memory transfers, fall back to the old memory xfer functions. */ | |
3938 | ||
9b409511 | 3939 | static enum target_xfer_status |
4e73f23d | 3940 | procfs_xfer_partial (struct target_ops *ops, enum target_object object, |
0b62613e | 3941 | const char *annex, gdb_byte *readbuf, |
9b409511 YQ |
3942 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, |
3943 | ULONGEST *xfered_len) | |
4e73f23d RM |
3944 | { |
3945 | switch (object) | |
3946 | { | |
3947 | case TARGET_OBJECT_MEMORY: | |
e96027e0 | 3948 | return procfs_xfer_memory (readbuf, writebuf, offset, len, xfered_len); |
4e73f23d RM |
3949 | |
3950 | #ifdef NEW_PROC_API | |
3951 | case TARGET_OBJECT_AUXV: | |
9f2982ff | 3952 | return memory_xfer_auxv (ops, object, annex, readbuf, writebuf, |
9b409511 | 3953 | offset, len, xfered_len); |
4e73f23d RM |
3954 | #endif |
3955 | ||
3956 | default: | |
e75fdfca TT |
3957 | return ops->beneath->to_xfer_partial (ops->beneath, object, annex, |
3958 | readbuf, writebuf, offset, len, | |
3959 | xfered_len); | |
4e73f23d RM |
3960 | } |
3961 | } | |
3962 | ||
e96027e0 PA |
3963 | /* Helper for procfs_xfer_partial that handles memory transfers. |
3964 | Arguments are like target_xfer_partial. */ | |
4e73f23d | 3965 | |
e96027e0 PA |
3966 | static enum target_xfer_status |
3967 | procfs_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf, | |
3968 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) | |
c3f6f71d JM |
3969 | { |
3970 | procinfo *pi; | |
e96027e0 | 3971 | int nbytes; |
c906108c | 3972 | |
0df8b418 | 3973 | /* Find procinfo for main process. */ |
dfd4cc63 | 3974 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
3975 | if (pi->as_fd == 0 && |
3976 | open_procinfo_files (pi, FD_AS) == 0) | |
c906108c | 3977 | { |
c3f6f71d | 3978 | proc_warn (pi, "xfer_memory, open_proc_files", __LINE__); |
e96027e0 | 3979 | return TARGET_XFER_E_IO; |
c906108c | 3980 | } |
c906108c | 3981 | |
e96027e0 PA |
3982 | if (lseek (pi->as_fd, (off_t) memaddr, SEEK_SET) != (off_t) memaddr) |
3983 | return TARGET_XFER_E_IO; | |
3984 | ||
3985 | if (writebuf != NULL) | |
c906108c | 3986 | { |
e96027e0 PA |
3987 | PROCFS_NOTE ("write memory:\n"); |
3988 | nbytes = write (pi->as_fd, writebuf, len); | |
3989 | } | |
3990 | else | |
3991 | { | |
3992 | PROCFS_NOTE ("read memory:\n"); | |
3993 | nbytes = read (pi->as_fd, readbuf, len); | |
c906108c | 3994 | } |
e96027e0 PA |
3995 | if (nbytes <= 0) |
3996 | return TARGET_XFER_E_IO; | |
3997 | *xfered_len = nbytes; | |
3998 | return TARGET_XFER_OK; | |
c906108c SS |
3999 | } |
4000 | ||
77382aee PA |
4001 | /* Called by target_resume before making child runnable. Mark cached |
4002 | registers and status's invalid. If there are "dirty" caches that | |
4003 | need to be written back to the child process, do that. | |
c906108c | 4004 | |
77382aee PA |
4005 | File descriptors are also cached. As they are a limited resource, |
4006 | we cannot hold onto them indefinitely. However, as they are | |
4007 | expensive to open, we don't want to throw them away | |
4008 | indescriminately either. As a compromise, we will keep the file | |
4009 | descriptors for the parent process, but discard any file | |
4010 | descriptors we may have accumulated for the threads. | |
4011 | ||
4012 | As this function is called by iterate_over_threads, it always | |
4013 | returns zero (so that iterate_over_threads will keep | |
4014 | iterating). */ | |
c3f6f71d JM |
4015 | |
4016 | static int | |
fba45db2 | 4017 | invalidate_cache (procinfo *parent, procinfo *pi, void *ptr) |
c906108c | 4018 | { |
77382aee PA |
4019 | /* About to run the child; invalidate caches and do any other |
4020 | cleanup. */ | |
c906108c | 4021 | |
c3f6f71d JM |
4022 | #if 0 |
4023 | if (pi->gregs_dirty) | |
4024 | if (parent == NULL || | |
4025 | proc_get_current_thread (parent) != pi->tid) | |
4026 | if (!proc_set_gregs (pi)) /* flush gregs cache */ | |
4027 | proc_warn (pi, "target_resume, set_gregs", | |
4028 | __LINE__); | |
f5656ead | 4029 | if (gdbarch_fp0_regnum (target_gdbarch ()) >= 0) |
60054393 MS |
4030 | if (pi->fpregs_dirty) |
4031 | if (parent == NULL || | |
4032 | proc_get_current_thread (parent) != pi->tid) | |
4033 | if (!proc_set_fpregs (pi)) /* flush fpregs cache */ | |
19958708 | 4034 | proc_warn (pi, "target_resume, set_fpregs", |
60054393 | 4035 | __LINE__); |
c906108c | 4036 | #endif |
c906108c | 4037 | |
c3f6f71d | 4038 | if (parent != NULL) |
c906108c | 4039 | { |
c3f6f71d | 4040 | /* The presence of a parent indicates that this is an LWP. |
19958708 | 4041 | Close any file descriptors that it might have open. |
c3f6f71d JM |
4042 | We don't do this to the master (parent) procinfo. */ |
4043 | ||
4044 | close_procinfo_files (pi); | |
c906108c | 4045 | } |
c3f6f71d JM |
4046 | pi->gregs_valid = 0; |
4047 | pi->fpregs_valid = 0; | |
4048 | #if 0 | |
4049 | pi->gregs_dirty = 0; | |
4050 | pi->fpregs_dirty = 0; | |
c906108c | 4051 | #endif |
c3f6f71d JM |
4052 | pi->status_valid = 0; |
4053 | pi->threads_valid = 0; | |
c906108c | 4054 | |
c3f6f71d | 4055 | return 0; |
c906108c SS |
4056 | } |
4057 | ||
0fda6bd2 | 4058 | #if 0 |
77382aee PA |
4059 | /* A callback function for iterate_over_threads. Find the |
4060 | asynchronous signal thread, and make it runnable. See if that | |
4061 | helps matters any. */ | |
c906108c | 4062 | |
c3f6f71d | 4063 | static int |
fba45db2 | 4064 | make_signal_thread_runnable (procinfo *process, procinfo *pi, void *ptr) |
c906108c | 4065 | { |
c3f6f71d JM |
4066 | #ifdef PR_ASLWP |
4067 | if (proc_flags (pi) & PR_ASLWP) | |
c906108c | 4068 | { |
c3f6f71d JM |
4069 | if (!proc_run_process (pi, 0, -1)) |
4070 | proc_error (pi, "make_signal_thread_runnable", __LINE__); | |
4071 | return 1; | |
c906108c | 4072 | } |
c906108c | 4073 | #endif |
c3f6f71d | 4074 | return 0; |
c906108c | 4075 | } |
0fda6bd2 | 4076 | #endif |
c906108c | 4077 | |
77382aee PA |
4078 | /* Make the child process runnable. Normally we will then call |
4079 | procfs_wait and wait for it to stop again (unless gdb is async). | |
4080 | ||
4081 | If STEP is true, then arrange for the child to stop again after | |
4082 | executing a single instruction. If SIGNO is zero, then cancel any | |
4083 | pending signal; if non-zero, then arrange for the indicated signal | |
4084 | to be delivered to the child when it runs. If PID is -1, then | |
4085 | allow any child thread to run; if non-zero, then allow only the | |
4086 | indicated thread to run. (not implemented yet). */ | |
c906108c SS |
4087 | |
4088 | static void | |
28439f5e | 4089 | procfs_resume (struct target_ops *ops, |
2ea28649 | 4090 | ptid_t ptid, int step, enum gdb_signal signo) |
c906108c | 4091 | { |
c3f6f71d JM |
4092 | procinfo *pi, *thread; |
4093 | int native_signo; | |
4094 | ||
19958708 | 4095 | /* 2.1: |
c3f6f71d | 4096 | prrun.prflags |= PRSVADDR; |
19958708 | 4097 | prrun.pr_vaddr = $PC; set resume address |
c3f6f71d | 4098 | prrun.prflags |= PRSTRACE; trace signals in pr_trace (all) |
19958708 | 4099 | prrun.prflags |= PRSFAULT; trace faults in pr_fault (all but PAGE) |
c3f6f71d JM |
4100 | prrun.prflags |= PRCFAULT; clear current fault. |
4101 | ||
4102 | PRSTRACE and PRSFAULT can be done by other means | |
77382aee | 4103 | (proc_trace_signals, proc_trace_faults) |
c3f6f71d JM |
4104 | PRSVADDR is unnecessary. |
4105 | PRCFAULT may be replaced by a PIOCCFAULT call (proc_clear_current_fault) | |
4106 | This basically leaves PRSTEP and PRCSIG. | |
4107 | PRCSIG is like PIOCSSIG (proc_clear_current_signal). | |
4108 | So basically PR_STEP is the sole argument that must be passed | |
77382aee | 4109 | to proc_run_process (for use in the prrun struct by ioctl). */ |
c3f6f71d | 4110 | |
0df8b418 | 4111 | /* Find procinfo for main process. */ |
dfd4cc63 | 4112 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d | 4113 | |
77382aee | 4114 | /* First cut: ignore pid argument. */ |
c3f6f71d | 4115 | errno = 0; |
c906108c | 4116 | |
c3f6f71d JM |
4117 | /* Convert signal to host numbering. */ |
4118 | if (signo == 0 || | |
a493e3e2 | 4119 | (signo == GDB_SIGNAL_STOP && pi->ignore_next_sigstop)) |
c3f6f71d JM |
4120 | native_signo = 0; |
4121 | else | |
2ea28649 | 4122 | native_signo = gdb_signal_to_host (signo); |
c906108c | 4123 | |
c3f6f71d | 4124 | pi->ignore_next_sigstop = 0; |
c906108c | 4125 | |
77382aee PA |
4126 | /* Running the process voids all cached registers and status. */ |
4127 | /* Void the threads' caches first. */ | |
19958708 | 4128 | proc_iterate_over_threads (pi, invalidate_cache, NULL); |
c3f6f71d JM |
4129 | /* Void the process procinfo's caches. */ |
4130 | invalidate_cache (NULL, pi, NULL); | |
c906108c | 4131 | |
dfd4cc63 | 4132 | if (ptid_get_pid (ptid) != -1) |
c906108c | 4133 | { |
77382aee PA |
4134 | /* Resume a specific thread, presumably suppressing the |
4135 | others. */ | |
dfd4cc63 | 4136 | thread = find_procinfo (ptid_get_pid (ptid), ptid_get_lwp (ptid)); |
7de45904 | 4137 | if (thread != NULL) |
c906108c | 4138 | { |
c3f6f71d JM |
4139 | if (thread->tid != 0) |
4140 | { | |
77382aee PA |
4141 | /* We're to resume a specific thread, and not the |
4142 | others. Set the child process's PR_ASYNC flag. */ | |
c3f6f71d JM |
4143 | #ifdef PR_ASYNC |
4144 | if (!proc_set_async (pi)) | |
4145 | proc_error (pi, "target_resume, set_async", __LINE__); | |
4146 | #endif | |
4147 | #if 0 | |
19958708 | 4148 | proc_iterate_over_threads (pi, |
c3f6f71d JM |
4149 | make_signal_thread_runnable, |
4150 | NULL); | |
4151 | #endif | |
0df8b418 MS |
4152 | pi = thread; /* Substitute the thread's procinfo |
4153 | for run. */ | |
c3f6f71d | 4154 | } |
c906108c SS |
4155 | } |
4156 | } | |
c906108c | 4157 | |
c3f6f71d | 4158 | if (!proc_run_process (pi, step, native_signo)) |
c906108c | 4159 | { |
c3f6f71d | 4160 | if (errno == EBUSY) |
77382aee PA |
4161 | warning (_("resume: target already running. " |
4162 | "Pretend to resume, and hope for the best!")); | |
c3f6f71d JM |
4163 | else |
4164 | proc_error (pi, "target_resume", __LINE__); | |
c906108c | 4165 | } |
c3f6f71d | 4166 | } |
c906108c | 4167 | |
77382aee | 4168 | /* Set up to trace signals in the child process. */ |
c906108c | 4169 | |
c3f6f71d | 4170 | static void |
94bedb42 TT |
4171 | procfs_pass_signals (struct target_ops *self, |
4172 | int numsigs, unsigned char *pass_signals) | |
c3f6f71d | 4173 | { |
37de36c6 | 4174 | gdb_sigset_t signals; |
dfd4cc63 | 4175 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
2455069d | 4176 | int signo; |
c906108c | 4177 | |
2455069d UW |
4178 | prfillset (&signals); |
4179 | ||
4180 | for (signo = 0; signo < NSIG; signo++) | |
4181 | { | |
2ea28649 | 4182 | int target_signo = gdb_signal_from_host (signo); |
2455069d UW |
4183 | if (target_signo < numsigs && pass_signals[target_signo]) |
4184 | gdb_prdelset (&signals, signo); | |
4185 | } | |
4186 | ||
4187 | if (!proc_set_traced_signals (pi, &signals)) | |
4188 | proc_error (pi, "pass_signals", __LINE__); | |
c3f6f71d | 4189 | } |
c906108c | 4190 | |
77382aee | 4191 | /* Print status information about the child process. */ |
c906108c | 4192 | |
c3f6f71d | 4193 | static void |
fba45db2 | 4194 | procfs_files_info (struct target_ops *ignore) |
c3f6f71d | 4195 | { |
181e7f93 | 4196 | struct inferior *inf = current_inferior (); |
f4a14ae6 | 4197 | |
a3f17187 | 4198 | printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"), |
181e7f93 | 4199 | inf->attach_flag? "attached": "child", |
39f77062 | 4200 | target_pid_to_str (inferior_ptid)); |
c3f6f71d | 4201 | } |
c906108c | 4202 | |
77382aee PA |
4203 | /* Stop the child process asynchronously, as when the gdb user types |
4204 | control-c or presses a "stop" button. Works by sending | |
4205 | kill(SIGINT) to the child's process group. */ | |
c906108c | 4206 | |
c3f6f71d | 4207 | static void |
bfedc46a | 4208 | procfs_interrupt (struct target_ops *self, ptid_t ptid) |
c3f6f71d | 4209 | { |
7e1789f5 | 4210 | kill (-inferior_process_group (), SIGINT); |
c906108c SS |
4211 | } |
4212 | ||
77382aee PA |
4213 | /* Make it die. Wait for it to die. Clean up after it. Note: this |
4214 | should only be applied to the real process, not to an LWP, because | |
4215 | of the check for parent-process. If we need this to work for an | |
4216 | LWP, it needs some more logic. */ | |
c906108c | 4217 | |
c3f6f71d | 4218 | static void |
fba45db2 | 4219 | unconditionally_kill_inferior (procinfo *pi) |
c3f6f71d JM |
4220 | { |
4221 | int parent_pid; | |
c906108c | 4222 | |
c3f6f71d | 4223 | parent_pid = proc_parent_pid (pi); |
c3f6f71d JM |
4224 | #ifdef PROCFS_NEED_PIOCSSIG_FOR_KILL |
4225 | /* Alpha OSF/1-2.x procfs needs a PIOCSSIG call with a SIGKILL signal | |
4226 | to kill the inferior, otherwise it might remain stopped with a | |
4227 | pending SIGKILL. | |
4228 | We do not check the result of the PIOCSSIG, the inferior might have | |
4229 | died already. */ | |
4230 | { | |
37de36c6 | 4231 | gdb_siginfo_t newsiginfo; |
c906108c | 4232 | |
c3f6f71d JM |
4233 | memset ((char *) &newsiginfo, 0, sizeof (newsiginfo)); |
4234 | newsiginfo.si_signo = SIGKILL; | |
4235 | newsiginfo.si_code = 0; | |
4236 | newsiginfo.si_errno = 0; | |
4237 | newsiginfo.si_pid = getpid (); | |
4238 | newsiginfo.si_uid = getuid (); | |
0df8b418 | 4239 | /* FIXME: use proc_set_current_signal. */ |
c3f6f71d JM |
4240 | ioctl (pi->ctl_fd, PIOCSSIG, &newsiginfo); |
4241 | } | |
4242 | #else /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ | |
4243 | if (!proc_kill (pi, SIGKILL)) | |
103b3ef5 | 4244 | proc_error (pi, "unconditionally_kill, proc_kill", __LINE__); |
c3f6f71d JM |
4245 | #endif /* PROCFS_NEED_PIOCSSIG_FOR_KILL */ |
4246 | destroy_procinfo (pi); | |
c906108c | 4247 | |
c3f6f71d JM |
4248 | /* If pi is GDB's child, wait for it to die. */ |
4249 | if (parent_pid == getpid ()) | |
19958708 | 4250 | /* FIXME: should we use waitpid to make sure we get the right event? |
c3f6f71d JM |
4251 | Should we check the returned event? */ |
4252 | { | |
0d06e24b | 4253 | #if 0 |
c3f6f71d | 4254 | int status, ret; |
c906108c | 4255 | |
c3f6f71d JM |
4256 | ret = waitpid (pi->pid, &status, 0); |
4257 | #else | |
4258 | wait (NULL); | |
4259 | #endif | |
4260 | } | |
4261 | } | |
c906108c | 4262 | |
77382aee PA |
4263 | /* We're done debugging it, and we want it to go away. Then we want |
4264 | GDB to forget all about it. */ | |
c906108c | 4265 | |
19958708 | 4266 | static void |
7d85a9c0 | 4267 | procfs_kill_inferior (struct target_ops *ops) |
c906108c | 4268 | { |
39f77062 | 4269 | if (!ptid_equal (inferior_ptid, null_ptid)) /* ? */ |
c3f6f71d | 4270 | { |
0df8b418 | 4271 | /* Find procinfo for main process. */ |
dfd4cc63 | 4272 | procinfo *pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
c906108c | 4273 | |
c3f6f71d JM |
4274 | if (pi) |
4275 | unconditionally_kill_inferior (pi); | |
4276 | target_mourn_inferior (); | |
c906108c | 4277 | } |
c3f6f71d JM |
4278 | } |
4279 | ||
77382aee | 4280 | /* Forget we ever debugged this thing! */ |
c906108c | 4281 | |
19958708 | 4282 | static void |
136d6dae | 4283 | procfs_mourn_inferior (struct target_ops *ops) |
c3f6f71d JM |
4284 | { |
4285 | procinfo *pi; | |
c906108c | 4286 | |
39f77062 | 4287 | if (!ptid_equal (inferior_ptid, null_ptid)) |
c3f6f71d | 4288 | { |
0df8b418 | 4289 | /* Find procinfo for main process. */ |
dfd4cc63 | 4290 | pi = find_procinfo (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
4291 | if (pi) |
4292 | destroy_procinfo (pi); | |
c906108c | 4293 | } |
6a3cb8e8 PA |
4294 | |
4295 | generic_mourn_inferior (); | |
8181d85f | 4296 | |
6a3cb8e8 | 4297 | inf_child_maybe_unpush_target (ops); |
c3f6f71d | 4298 | } |
c906108c | 4299 | |
77382aee PA |
4300 | /* When GDB forks to create a runnable inferior process, this function |
4301 | is called on the parent side of the fork. It's job is to do | |
4302 | whatever is necessary to make the child ready to be debugged, and | |
4303 | then wait for the child to synchronize. */ | |
c906108c | 4304 | |
19958708 | 4305 | static void |
28439f5e | 4306 | procfs_init_inferior (struct target_ops *ops, int pid) |
c3f6f71d JM |
4307 | { |
4308 | procinfo *pi; | |
37de36c6 | 4309 | gdb_sigset_t signals; |
c3f6f71d | 4310 | int fail; |
2689673f | 4311 | int lwpid; |
c906108c | 4312 | |
c3f6f71d JM |
4313 | /* This routine called on the parent side (GDB side) |
4314 | after GDB forks the inferior. */ | |
6a3cb8e8 PA |
4315 | if (!target_is_pushed (ops)) |
4316 | push_target (ops); | |
c906108c | 4317 | |
c3f6f71d | 4318 | if ((pi = create_procinfo (pid, 0)) == NULL) |
9b20d036 | 4319 | perror (_("procfs: out of memory in 'init_inferior'")); |
c3f6f71d JM |
4320 | |
4321 | if (!open_procinfo_files (pi, FD_CTL)) | |
4322 | proc_error (pi, "init_inferior, open_proc_files", __LINE__); | |
4323 | ||
4324 | /* | |
4325 | xmalloc // done | |
4326 | open_procinfo_files // done | |
4327 | link list // done | |
4328 | prfillset (trace) | |
4329 | procfs_notice_signals | |
4330 | prfillset (fault) | |
4331 | prdelset (FLTPAGE) | |
4332 | PIOCWSTOP | |
4333 | PIOCSFAULT | |
4334 | */ | |
4335 | ||
77382aee | 4336 | /* If not stopped yet, wait for it to stop. */ |
c3f6f71d JM |
4337 | if (!(proc_flags (pi) & PR_STOPPED) && |
4338 | !(proc_wait_for_stop (pi))) | |
4339 | dead_procinfo (pi, "init_inferior: wait_for_stop failed", KILL); | |
4340 | ||
4341 | /* Save some of the /proc state to be restored if we detach. */ | |
4342 | /* FIXME: Why? In case another debugger was debugging it? | |
0df8b418 | 4343 | We're it's parent, for Ghu's sake! */ |
c3f6f71d JM |
4344 | if (!proc_get_traced_signals (pi, &pi->saved_sigset)) |
4345 | proc_error (pi, "init_inferior, get_traced_signals", __LINE__); | |
4346 | if (!proc_get_held_signals (pi, &pi->saved_sighold)) | |
4347 | proc_error (pi, "init_inferior, get_held_signals", __LINE__); | |
4348 | if (!proc_get_traced_faults (pi, &pi->saved_fltset)) | |
4349 | proc_error (pi, "init_inferior, get_traced_faults", __LINE__); | |
37de36c6 | 4350 | if (!proc_get_traced_sysentry (pi, pi->saved_entryset)) |
c3f6f71d | 4351 | proc_error (pi, "init_inferior, get_traced_sysentry", __LINE__); |
37de36c6 | 4352 | if (!proc_get_traced_sysexit (pi, pi->saved_exitset)) |
c3f6f71d JM |
4353 | proc_error (pi, "init_inferior, get_traced_sysexit", __LINE__); |
4354 | ||
c3f6f71d JM |
4355 | if ((fail = procfs_debug_inferior (pi)) != 0) |
4356 | proc_error (pi, "init_inferior (procfs_debug_inferior)", fail); | |
4357 | ||
0d06e24b JM |
4358 | /* FIXME: logically, we should really be turning OFF run-on-last-close, |
4359 | and possibly even turning ON kill-on-last-close at this point. But | |
4360 | I can't make that change without careful testing which I don't have | |
4361 | time to do right now... */ | |
c3f6f71d JM |
4362 | /* Turn on run-on-last-close flag so that the child |
4363 | will die if GDB goes away for some reason. */ | |
4364 | if (!proc_set_run_on_last_close (pi)) | |
4365 | proc_error (pi, "init_inferior, set_RLC", __LINE__); | |
4366 | ||
2689673f PA |
4367 | /* We now have have access to the lwpid of the main thread/lwp. */ |
4368 | lwpid = proc_get_current_thread (pi); | |
4369 | ||
4370 | /* Create a procinfo for the main lwp. */ | |
4371 | create_procinfo (pid, lwpid); | |
4372 | ||
4373 | /* We already have a main thread registered in the thread table at | |
4374 | this point, but it didn't have any lwp info yet. Notify the core | |
4375 | about it. This changes inferior_ptid as well. */ | |
4376 | thread_change_ptid (pid_to_ptid (pid), | |
793e1c06 | 4377 | ptid_build (pid, lwpid, 0)); |
c906108c | 4378 | |
c3f6f71d | 4379 | startup_inferior (START_INFERIOR_TRAPS_EXPECTED); |
9185ddce JB |
4380 | |
4381 | #ifdef SYS_syssgi | |
4382 | /* On mips-irix, we need to stop the inferior early enough during | |
4383 | the startup phase in order to be able to load the shared library | |
4384 | symbols and insert the breakpoints that are located in these shared | |
4385 | libraries. Stopping at the program entry point is not good enough | |
4386 | because the -init code is executed before the execution reaches | |
4387 | that point. | |
4388 | ||
4389 | So what we need to do is to insert a breakpoint in the runtime | |
4390 | loader (rld), more precisely in __dbx_link(). This procedure is | |
4391 | called by rld once all shared libraries have been mapped, but before | |
0df8b418 | 4392 | the -init code is executed. Unfortuantely, this is not straightforward, |
9185ddce JB |
4393 | as rld is not part of the executable we are running, and thus we need |
4394 | the inferior to run until rld itself has been mapped in memory. | |
77382aee | 4395 | |
9185ddce JB |
4396 | For this, we trace all syssgi() syscall exit events. Each time |
4397 | we detect such an event, we iterate over each text memory maps, | |
4398 | get its associated fd, and scan the symbol table for __dbx_link(). | |
4399 | When found, we know that rld has been mapped, and that we can insert | |
4400 | the breakpoint at the symbol address. Once the dbx_link() breakpoint | |
4401 | has been inserted, the syssgi() notifications are no longer necessary, | |
4402 | so they should be canceled. */ | |
4403 | proc_trace_syscalls_1 (pi, SYS_syssgi, PR_SYSEXIT, FLAG_SET, 0); | |
9185ddce | 4404 | #endif |
c3f6f71d | 4405 | } |
c906108c | 4406 | |
77382aee PA |
4407 | /* When GDB forks to create a new process, this function is called on |
4408 | the child side of the fork before GDB exec's the user program. Its | |
4409 | job is to make the child minimally debuggable, so that the parent | |
4410 | GDB process can connect to the child and take over. This function | |
4411 | should do only the minimum to make that possible, and to | |
4412 | synchronize with the parent process. The parent process should | |
4413 | take care of the details. */ | |
c3f6f71d JM |
4414 | |
4415 | static void | |
fba45db2 | 4416 | procfs_set_exec_trap (void) |
c3f6f71d JM |
4417 | { |
4418 | /* This routine called on the child side (inferior side) | |
4419 | after GDB forks the inferior. It must use only local variables, | |
4420 | because it may be sharing data space with its parent. */ | |
c906108c | 4421 | |
c3f6f71d | 4422 | procinfo *pi; |
37de36c6 | 4423 | sysset_t *exitset; |
c906108c | 4424 | |
c3f6f71d | 4425 | if ((pi = create_procinfo (getpid (), 0)) == NULL) |
e2e0b3e5 | 4426 | perror_with_name (_("procfs: create_procinfo failed in child.")); |
c906108c | 4427 | |
c3f6f71d JM |
4428 | if (open_procinfo_files (pi, FD_CTL) == 0) |
4429 | { | |
4430 | proc_warn (pi, "set_exec_trap, open_proc_files", __LINE__); | |
4431 | gdb_flush (gdb_stderr); | |
77382aee PA |
4432 | /* No need to call "dead_procinfo", because we're going to |
4433 | exit. */ | |
c3f6f71d JM |
4434 | _exit (127); |
4435 | } | |
c906108c | 4436 | |
c3f6f71d JM |
4437 | #ifdef PRFS_STOPEXEC /* defined on OSF */ |
4438 | /* OSF method for tracing exec syscalls. Quoting: | |
4439 | Under Alpha OSF/1 we have to use a PIOCSSPCACT ioctl to trace | |
4440 | exits from exec system calls because of the user level loader. */ | |
77382aee | 4441 | /* FIXME: make nice and maybe move into an access function. */ |
c3f6f71d JM |
4442 | { |
4443 | int prfs_flags; | |
c906108c | 4444 | |
c3f6f71d JM |
4445 | if (ioctl (pi->ctl_fd, PIOCGSPCACT, &prfs_flags) < 0) |
4446 | { | |
4447 | proc_warn (pi, "set_exec_trap (PIOCGSPCACT)", __LINE__); | |
4448 | gdb_flush (gdb_stderr); | |
4449 | _exit (127); | |
4450 | } | |
4451 | prfs_flags |= PRFS_STOPEXEC; | |
c906108c | 4452 | |
c3f6f71d JM |
4453 | if (ioctl (pi->ctl_fd, PIOCSSPCACT, &prfs_flags) < 0) |
4454 | { | |
4455 | proc_warn (pi, "set_exec_trap (PIOCSSPCACT)", __LINE__); | |
4456 | gdb_flush (gdb_stderr); | |
4457 | _exit (127); | |
4458 | } | |
4459 | } | |
4460 | #else /* not PRFS_STOPEXEC */ | |
77382aee | 4461 | /* Everyone else's (except OSF) method for tracing exec syscalls. */ |
c3f6f71d JM |
4462 | /* GW: Rationale... |
4463 | Not all systems with /proc have all the exec* syscalls with the same | |
4464 | names. On the SGI, for example, there is no SYS_exec, but there | |
77382aee | 4465 | *is* a SYS_execv. So, we try to account for that. */ |
c906108c | 4466 | |
37de36c6 KB |
4467 | exitset = sysset_t_alloc (pi); |
4468 | gdb_premptysysset (exitset); | |
c3f6f71d | 4469 | #ifdef SYS_exec |
37de36c6 | 4470 | gdb_praddsysset (exitset, SYS_exec); |
c3f6f71d JM |
4471 | #endif |
4472 | #ifdef SYS_execve | |
37de36c6 | 4473 | gdb_praddsysset (exitset, SYS_execve); |
c3f6f71d JM |
4474 | #endif |
4475 | #ifdef SYS_execv | |
37de36c6 | 4476 | gdb_praddsysset (exitset, SYS_execv); |
c906108c | 4477 | #endif |
37de36c6 KB |
4478 | #ifdef DYNAMIC_SYSCALLS |
4479 | { | |
4480 | int callnum = find_syscall (pi, "execve"); | |
4481 | ||
4482 | if (callnum >= 0) | |
4483 | gdb_praddsysset (exitset, callnum); | |
c906108c | 4484 | |
37de36c6 KB |
4485 | callnum = find_syscall (pi, "ra_execve"); |
4486 | if (callnum >= 0) | |
4487 | gdb_praddsysset (exitset, callnum); | |
4488 | } | |
4489 | #endif /* DYNAMIC_SYSCALLS */ | |
4490 | ||
4491 | if (!proc_set_traced_sysexit (pi, exitset)) | |
c906108c | 4492 | { |
c3f6f71d JM |
4493 | proc_warn (pi, "set_exec_trap, set_traced_sysexit", __LINE__); |
4494 | gdb_flush (gdb_stderr); | |
4495 | _exit (127); | |
c906108c | 4496 | } |
c3f6f71d JM |
4497 | #endif /* PRFS_STOPEXEC */ |
4498 | ||
0df8b418 | 4499 | /* FIXME: should this be done in the parent instead? */ |
c3f6f71d JM |
4500 | /* Turn off inherit on fork flag so that all grand-children |
4501 | of gdb start with tracing flags cleared. */ | |
4502 | if (!proc_unset_inherit_on_fork (pi)) | |
4503 | proc_warn (pi, "set_exec_trap, unset_inherit", __LINE__); | |
4504 | ||
4505 | /* Turn off run on last close flag, so that the child process | |
4506 | cannot run away just because we close our handle on it. | |
4507 | We want it to wait for the parent to attach. */ | |
4508 | if (!proc_unset_run_on_last_close (pi)) | |
4509 | proc_warn (pi, "set_exec_trap, unset_RLC", __LINE__); | |
4510 | ||
19958708 | 4511 | /* FIXME: No need to destroy the procinfo -- |
0df8b418 | 4512 | we have our own address space, and we're about to do an exec! */ |
c3f6f71d | 4513 | /*destroy_procinfo (pi);*/ |
c906108c | 4514 | } |
c906108c | 4515 | |
77382aee PA |
4516 | /* This function is called BEFORE gdb forks the inferior process. Its |
4517 | only real responsibility is to set things up for the fork, and tell | |
4518 | GDB which two functions to call after the fork (one for the parent, | |
4519 | and one for the child). | |
4520 | ||
4521 | This function does a complicated search for a unix shell program, | |
4522 | which it then uses to parse arguments and environment variables to | |
4523 | be sent to the child. I wonder whether this code could not be | |
4524 | abstracted out and shared with other unix targets such as | |
4525 | inf-ptrace? */ | |
c906108c SS |
4526 | |
4527 | static void | |
136d6dae VP |
4528 | procfs_create_inferior (struct target_ops *ops, char *exec_file, |
4529 | char *allargs, char **env, int from_tty) | |
c906108c SS |
4530 | { |
4531 | char *shell_file = getenv ("SHELL"); | |
4532 | char *tryname; | |
28439f5e PA |
4533 | int pid; |
4534 | ||
c906108c SS |
4535 | if (shell_file != NULL && strchr (shell_file, '/') == NULL) |
4536 | { | |
4537 | ||
4538 | /* We will be looking down the PATH to find shell_file. If we | |
c3f6f71d JM |
4539 | just do this the normal way (via execlp, which operates by |
4540 | attempting an exec for each element of the PATH until it | |
4541 | finds one which succeeds), then there will be an exec for | |
4542 | each failed attempt, each of which will cause a PR_SYSEXIT | |
4543 | stop, and we won't know how to distinguish the PR_SYSEXIT's | |
4544 | for these failed execs with the ones for successful execs | |
4545 | (whether the exec has succeeded is stored at that time in the | |
4546 | carry bit or some such architecture-specific and | |
4547 | non-ABI-specified place). | |
4548 | ||
4549 | So I can't think of anything better than to search the PATH | |
4550 | now. This has several disadvantages: (1) There is a race | |
4551 | condition; if we find a file now and it is deleted before we | |
4552 | exec it, we lose, even if the deletion leaves a valid file | |
4553 | further down in the PATH, (2) there is no way to know exactly | |
4554 | what an executable (in the sense of "capable of being | |
4555 | exec'd") file is. Using access() loses because it may lose | |
4556 | if the caller is the superuser; failing to use it loses if | |
4557 | there are ACLs or some such. */ | |
c906108c SS |
4558 | |
4559 | char *p; | |
4560 | char *p1; | |
4561 | /* FIXME-maybe: might want "set path" command so user can change what | |
c3f6f71d | 4562 | path is used from within GDB. */ |
c906108c SS |
4563 | char *path = getenv ("PATH"); |
4564 | int len; | |
4565 | struct stat statbuf; | |
4566 | ||
4567 | if (path == NULL) | |
4568 | path = "/bin:/usr/bin"; | |
4569 | ||
4570 | tryname = alloca (strlen (path) + strlen (shell_file) + 2); | |
c3f6f71d | 4571 | for (p = path; p != NULL; p = p1 ? p1 + 1: NULL) |
c906108c SS |
4572 | { |
4573 | p1 = strchr (p, ':'); | |
4574 | if (p1 != NULL) | |
4575 | len = p1 - p; | |
4576 | else | |
4577 | len = strlen (p); | |
4578 | strncpy (tryname, p, len); | |
4579 | tryname[len] = '\0'; | |
4580 | strcat (tryname, "/"); | |
4581 | strcat (tryname, shell_file); | |
4582 | if (access (tryname, X_OK) < 0) | |
4583 | continue; | |
4584 | if (stat (tryname, &statbuf) < 0) | |
4585 | continue; | |
4586 | if (!S_ISREG (statbuf.st_mode)) | |
4587 | /* We certainly need to reject directories. I'm not quite | |
4588 | as sure about FIFOs, sockets, etc., but I kind of doubt | |
4589 | that people want to exec() these things. */ | |
4590 | continue; | |
4591 | break; | |
4592 | } | |
4593 | if (p == NULL) | |
4594 | /* Not found. This must be an error rather than merely passing | |
4595 | the file to execlp(), because execlp() would try all the | |
4596 | exec()s, causing GDB to get confused. */ | |
8a3fe4f8 | 4597 | error (_("procfs:%d -- Can't find shell %s in PATH"), |
c3f6f71d | 4598 | __LINE__, shell_file); |
c906108c SS |
4599 | |
4600 | shell_file = tryname; | |
4601 | } | |
4602 | ||
28439f5e | 4603 | pid = fork_inferior (exec_file, allargs, env, procfs_set_exec_trap, |
e69860f1 | 4604 | NULL, NULL, shell_file, NULL); |
28439f5e PA |
4605 | |
4606 | procfs_init_inferior (ops, pid); | |
27087a3d JB |
4607 | } |
4608 | ||
4609 | /* An observer for the "inferior_created" event. */ | |
c906108c | 4610 | |
27087a3d JB |
4611 | static void |
4612 | procfs_inferior_created (struct target_ops *ops, int from_tty) | |
4613 | { | |
9185ddce | 4614 | #ifdef SYS_syssgi |
77382aee | 4615 | /* Make sure to cancel the syssgi() syscall-exit notifications. |
9185ddce JB |
4616 | They should normally have been removed by now, but they may still |
4617 | be activated if the inferior doesn't use shared libraries, or if | |
4618 | we didn't locate __dbx_link, or if we never stopped in __dbx_link. | |
27087a3d JB |
4619 | See procfs_init_inferior() for more details. |
4620 | ||
4621 | Since these notifications are only ever enabled when we spawned | |
4622 | the inferior ourselves, there is nothing to do when the inferior | |
4623 | was created by attaching to an already running process, or when | |
4624 | debugging a core file. */ | |
4625 | if (current_inferior ()->attach_flag || !target_can_run (¤t_target)) | |
4626 | return; | |
4627 | ||
dfd4cc63 LM |
4628 | proc_trace_syscalls_1 (find_procinfo_or_die (ptid_get_pid (inferior_ptid), |
4629 | 0), SYS_syssgi, PR_SYSEXIT, FLAG_RESET, 0); | |
9185ddce | 4630 | #endif |
c906108c SS |
4631 | } |
4632 | ||
e8032dde | 4633 | /* Callback for update_thread_list. Calls "add_thread". */ |
c906108c | 4634 | |
c3f6f71d | 4635 | static int |
fba45db2 | 4636 | procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr) |
c906108c | 4637 | { |
dfd4cc63 | 4638 | ptid_t gdb_threadid = ptid_build (pi->pid, thread->tid, 0); |
c906108c | 4639 | |
2689673f | 4640 | if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid)) |
c3f6f71d | 4641 | add_thread (gdb_threadid); |
c906108c | 4642 | |
c3f6f71d JM |
4643 | return 0; |
4644 | } | |
4645 | ||
77382aee PA |
4646 | /* Query all the threads that the target knows about, and give them |
4647 | back to GDB to add to its list. */ | |
c3f6f71d | 4648 | |
d3581e61 | 4649 | static void |
e8032dde | 4650 | procfs_update_thread_list (struct target_ops *ops) |
c3f6f71d JM |
4651 | { |
4652 | procinfo *pi; | |
4653 | ||
e8032dde PA |
4654 | prune_threads (); |
4655 | ||
0df8b418 | 4656 | /* Find procinfo for main process. */ |
dfd4cc63 | 4657 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
4658 | proc_update_threads (pi); |
4659 | proc_iterate_over_threads (pi, procfs_notice_thread, NULL); | |
c906108c SS |
4660 | } |
4661 | ||
77382aee PA |
4662 | /* Return true if the thread is still 'alive'. This guy doesn't |
4663 | really seem to be doing his job. Got to investigate how to tell | |
4664 | when a thread is really gone. */ | |
c906108c | 4665 | |
c906108c | 4666 | static int |
28439f5e | 4667 | procfs_thread_alive (struct target_ops *ops, ptid_t ptid) |
c906108c | 4668 | { |
c3f6f71d JM |
4669 | int proc, thread; |
4670 | procinfo *pi; | |
c906108c | 4671 | |
dfd4cc63 LM |
4672 | proc = ptid_get_pid (ptid); |
4673 | thread = ptid_get_lwp (ptid); | |
0df8b418 | 4674 | /* If I don't know it, it ain't alive! */ |
c3f6f71d JM |
4675 | if ((pi = find_procinfo (proc, thread)) == NULL) |
4676 | return 0; | |
4677 | ||
4678 | /* If I can't get its status, it ain't alive! | |
4679 | What's more, I need to forget about it! */ | |
4680 | if (!proc_get_status (pi)) | |
4681 | { | |
4682 | destroy_procinfo (pi); | |
4683 | return 0; | |
4684 | } | |
77382aee PA |
4685 | /* I couldn't have got its status if it weren't alive, so it's |
4686 | alive. */ | |
c3f6f71d | 4687 | return 1; |
c906108c | 4688 | } |
c3f6f71d | 4689 | |
77382aee PA |
4690 | /* Convert PTID to a string. Returns the string in a static |
4691 | buffer. */ | |
c3f6f71d | 4692 | |
d3581e61 | 4693 | static char * |
117de6a9 | 4694 | procfs_pid_to_str (struct target_ops *ops, ptid_t ptid) |
c3f6f71d JM |
4695 | { |
4696 | static char buf[80]; | |
c3f6f71d | 4697 | |
dfd4cc63 LM |
4698 | if (ptid_get_lwp (ptid) == 0) |
4699 | sprintf (buf, "process %d", ptid_get_pid (ptid)); | |
c3f6f71d | 4700 | else |
dfd4cc63 | 4701 | sprintf (buf, "LWP %ld", ptid_get_lwp (ptid)); |
5240ceac MK |
4702 | |
4703 | return buf; | |
c3f6f71d JM |
4704 | } |
4705 | ||
77382aee | 4706 | /* Insert a watchpoint. */ |
c3f6f71d | 4707 | |
a0911fd0 | 4708 | static int |
39f77062 | 4709 | procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, |
77382aee | 4710 | int after) |
c906108c | 4711 | { |
37de36c6 | 4712 | #ifndef AIX5 |
c3f6f71d | 4713 | int pflags = 0; |
19958708 | 4714 | procinfo *pi; |
c3f6f71d | 4715 | |
dfd4cc63 LM |
4716 | pi = find_procinfo_or_die (ptid_get_pid (ptid) == -1 ? |
4717 | ptid_get_pid (inferior_ptid) : ptid_get_pid (ptid), | |
4718 | 0); | |
c3f6f71d | 4719 | |
0df8b418 MS |
4720 | /* Translate from GDB's flags to /proc's. */ |
4721 | if (len > 0) /* len == 0 means delete watchpoint. */ | |
c906108c | 4722 | { |
0df8b418 | 4723 | switch (rwflag) { /* FIXME: need an enum! */ |
c3f6f71d JM |
4724 | case hw_write: /* default watchpoint (write) */ |
4725 | pflags = WRITE_WATCHFLAG; | |
4726 | break; | |
4727 | case hw_read: /* read watchpoint */ | |
4728 | pflags = READ_WATCHFLAG; | |
4729 | break; | |
4730 | case hw_access: /* access watchpoint */ | |
4731 | pflags = READ_WATCHFLAG | WRITE_WATCHFLAG; | |
4732 | break; | |
4733 | case hw_execute: /* execution HW breakpoint */ | |
4734 | pflags = EXEC_WATCHFLAG; | |
4735 | break; | |
0df8b418 | 4736 | default: /* Something weird. Return error. */ |
c906108c | 4737 | return -1; |
c3f6f71d | 4738 | } |
0df8b418 | 4739 | if (after) /* Stop after r/w access is completed. */ |
c3f6f71d JM |
4740 | pflags |= AFTER_WATCHFLAG; |
4741 | } | |
4742 | ||
4743 | if (!proc_set_watchpoint (pi, addr, len, pflags)) | |
4744 | { | |
0df8b418 | 4745 | if (errno == E2BIG) /* Typical error for no resources. */ |
c3f6f71d JM |
4746 | return -1; /* fail */ |
4747 | /* GDB may try to remove the same watchpoint twice. | |
4748 | If a remove request returns no match, don't error. */ | |
c906108c | 4749 | if (errno == ESRCH && len == 0) |
c3f6f71d JM |
4750 | return 0; /* ignore */ |
4751 | proc_error (pi, "set_watchpoint", __LINE__); | |
c906108c | 4752 | } |
37de36c6 | 4753 | #endif /* AIX5 */ |
c906108c SS |
4754 | return 0; |
4755 | } | |
4756 | ||
1e03ad20 KB |
4757 | /* Return non-zero if we can set a hardware watchpoint of type TYPE. TYPE |
4758 | is one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, | |
4759 | or bp_hardware_watchpoint. CNT is the number of watchpoints used so | |
4760 | far. | |
19958708 | 4761 | |
1e03ad20 KB |
4762 | Note: procfs_can_use_hw_breakpoint() is not yet used by all |
4763 | procfs.c targets due to the fact that some of them still define | |
d92524f1 | 4764 | target_can_use_hardware_watchpoint. */ |
1e03ad20 KB |
4765 | |
4766 | static int | |
5461485a | 4767 | procfs_can_use_hw_breakpoint (struct target_ops *self, |
f486487f SM |
4768 | enum bptype type, |
4769 | int cnt, int othertype) | |
1e03ad20 | 4770 | { |
1e03ad20 KB |
4771 | /* Due to the way that proc_set_watchpoint() is implemented, host |
4772 | and target pointers must be of the same size. If they are not, | |
4773 | we can't use hardware watchpoints. This limitation is due to the | |
9a043c1d AC |
4774 | fact that proc_set_watchpoint() calls |
4775 | procfs_address_to_host_pointer(); a close inspection of | |
4776 | procfs_address_to_host_pointer will reveal that an internal error | |
4777 | will be generated when the host and target pointer sizes are | |
4778 | different. */ | |
f5656ead | 4779 | struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr; |
f4a14ae6 | 4780 | |
4e906f53 | 4781 | if (sizeof (void *) != TYPE_LENGTH (ptr_type)) |
1e03ad20 KB |
4782 | return 0; |
4783 | ||
4784 | /* Other tests here??? */ | |
4785 | ||
4786 | return 1; | |
1e03ad20 KB |
4787 | } |
4788 | ||
77382aee PA |
4789 | /* Returns non-zero if process is stopped on a hardware watchpoint |
4790 | fault, else returns zero. */ | |
c3f6f71d | 4791 | |
25513619 | 4792 | static int |
6a109b6b | 4793 | procfs_stopped_by_watchpoint (struct target_ops *ops) |
c906108c | 4794 | { |
c3f6f71d | 4795 | procinfo *pi; |
c906108c | 4796 | |
dfd4cc63 | 4797 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
aaeb7efa | 4798 | |
c3f6f71d | 4799 | if (proc_flags (pi) & (PR_STOPPED | PR_ISTOP)) |
c906108c | 4800 | { |
c3f6f71d | 4801 | if (proc_why (pi) == PR_FAULTED) |
19958708 | 4802 | { |
c906108c | 4803 | #ifdef FLTWATCH |
c3f6f71d JM |
4804 | if (proc_what (pi) == FLTWATCH) |
4805 | return 1; | |
c906108c SS |
4806 | #endif |
4807 | #ifdef FLTKWATCH | |
c3f6f71d JM |
4808 | if (proc_what (pi) == FLTKWATCH) |
4809 | return 1; | |
c906108c | 4810 | #endif |
c3f6f71d | 4811 | } |
c906108c SS |
4812 | } |
4813 | return 0; | |
4814 | } | |
c906108c | 4815 | |
77382aee PA |
4816 | /* Returns 1 if the OS knows the position of the triggered watchpoint, |
4817 | and sets *ADDR to that address. Returns 0 if OS cannot report that | |
4818 | address. This function is only called if | |
4819 | procfs_stopped_by_watchpoint returned 1, thus no further checks are | |
4820 | done. The function also assumes that ADDR is not NULL. */ | |
bf701c2c PM |
4821 | |
4822 | static int | |
4823 | procfs_stopped_data_address (struct target_ops *targ, CORE_ADDR *addr) | |
4824 | { | |
4825 | procinfo *pi; | |
4826 | ||
dfd4cc63 | 4827 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
bf701c2c PM |
4828 | return proc_watchpoint_address (pi, addr); |
4829 | } | |
4830 | ||
25513619 | 4831 | static int |
7bb99c53 | 4832 | procfs_insert_watchpoint (struct target_ops *self, |
f486487f SM |
4833 | CORE_ADDR addr, int len, |
4834 | enum target_hw_bp_type type, | |
0cf6dd15 | 4835 | struct expression *cond) |
25513619 | 4836 | { |
d92524f1 | 4837 | if (!target_have_steppable_watchpoint |
f5656ead | 4838 | && !gdbarch_have_nonsteppable_watchpoint (target_gdbarch ())) |
25513619 PA |
4839 | { |
4840 | /* When a hardware watchpoint fires off the PC will be left at | |
4841 | the instruction following the one which caused the | |
4842 | watchpoint. It will *NOT* be necessary for GDB to step over | |
4843 | the watchpoint. */ | |
4844 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 1); | |
4845 | } | |
4846 | else | |
4847 | { | |
4848 | /* When a hardware watchpoint fires off the PC will be left at | |
4849 | the instruction which caused the watchpoint. It will be | |
4850 | necessary for GDB to step over the watchpoint. */ | |
4851 | return procfs_set_watchpoint (inferior_ptid, addr, len, type, 0); | |
4852 | } | |
4853 | } | |
4854 | ||
4855 | static int | |
11b5219a | 4856 | procfs_remove_watchpoint (struct target_ops *self, |
f486487f SM |
4857 | CORE_ADDR addr, int len, |
4858 | enum target_hw_bp_type type, | |
0cf6dd15 | 4859 | struct expression *cond) |
25513619 PA |
4860 | { |
4861 | return procfs_set_watchpoint (inferior_ptid, addr, 0, 0, 0); | |
4862 | } | |
4863 | ||
4864 | static int | |
31568a15 TT |
4865 | procfs_region_ok_for_hw_watchpoint (struct target_ops *self, |
4866 | CORE_ADDR addr, int len) | |
25513619 PA |
4867 | { |
4868 | /* The man page for proc(4) on Solaris 2.6 and up says that the | |
4869 | system can support "thousands" of hardware watchpoints, but gives | |
4870 | no method for finding out how many; It doesn't say anything about | |
4871 | the allowed size for the watched area either. So we just tell | |
4872 | GDB 'yes'. */ | |
4873 | return 1; | |
4874 | } | |
4875 | ||
4876 | void | |
4877 | procfs_use_watchpoints (struct target_ops *t) | |
4878 | { | |
4879 | t->to_stopped_by_watchpoint = procfs_stopped_by_watchpoint; | |
4880 | t->to_insert_watchpoint = procfs_insert_watchpoint; | |
4881 | t->to_remove_watchpoint = procfs_remove_watchpoint; | |
4882 | t->to_region_ok_for_hw_watchpoint = procfs_region_ok_for_hw_watchpoint; | |
d1a7880c | 4883 | t->to_can_use_hw_breakpoint = procfs_can_use_hw_breakpoint; |
bf701c2c | 4884 | t->to_stopped_data_address = procfs_stopped_data_address; |
25513619 PA |
4885 | } |
4886 | ||
77382aee PA |
4887 | /* Memory Mappings Functions: */ |
4888 | ||
4889 | /* Call a callback function once for each mapping, passing it the | |
4890 | mapping, an optional secondary callback function, and some optional | |
4891 | opaque data. Quit and return the first non-zero value returned | |
4892 | from the callback. | |
4893 | ||
4894 | PI is the procinfo struct for the process to be mapped. FUNC is | |
4895 | the callback function to be called by this iterator. DATA is the | |
4896 | optional opaque data to be passed to the callback function. | |
4897 | CHILD_FUNC is the optional secondary function pointer to be passed | |
4898 | to the child function. Returns the first non-zero return value | |
4899 | from the callback function, or zero. */ | |
831e682e MS |
4900 | |
4901 | static int | |
b8edc417 | 4902 | iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func, |
e9ef4f39 | 4903 | void *data, |
19958708 | 4904 | int (*func) (struct prmap *map, |
b8edc417 | 4905 | find_memory_region_ftype child_func, |
831e682e MS |
4906 | void *data)) |
4907 | { | |
4908 | char pathname[MAX_PROC_NAME_SIZE]; | |
4909 | struct prmap *prmaps; | |
4910 | struct prmap *prmap; | |
4911 | int funcstat; | |
4912 | int map_fd; | |
4913 | int nmap; | |
0a86f364 | 4914 | struct cleanup *cleanups = make_cleanup (null_cleanup, NULL); |
831e682e MS |
4915 | #ifdef NEW_PROC_API |
4916 | struct stat sbuf; | |
4917 | #endif | |
4918 | ||
19958708 | 4919 | /* Get the number of mappings, allocate space, |
831e682e MS |
4920 | and read the mappings into prmaps. */ |
4921 | #ifdef NEW_PROC_API | |
0df8b418 | 4922 | /* Open map fd. */ |
831e682e MS |
4923 | sprintf (pathname, "/proc/%d/map", pi->pid); |
4924 | if ((map_fd = open (pathname, O_RDONLY)) < 0) | |
4925 | proc_error (pi, "iterate_over_mappings (open)", __LINE__); | |
4926 | ||
0df8b418 | 4927 | /* Make sure it gets closed again. */ |
831e682e MS |
4928 | make_cleanup_close (map_fd); |
4929 | ||
19958708 | 4930 | /* Use stat to determine the file size, and compute |
831e682e MS |
4931 | the number of prmap_t objects it contains. */ |
4932 | if (fstat (map_fd, &sbuf) != 0) | |
4933 | proc_error (pi, "iterate_over_mappings (fstat)", __LINE__); | |
4934 | ||
4935 | nmap = sbuf.st_size / sizeof (prmap_t); | |
4936 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
4937 | if (read (map_fd, (char *) prmaps, nmap * sizeof (*prmaps)) | |
4938 | != (nmap * sizeof (*prmaps))) | |
4939 | proc_error (pi, "iterate_over_mappings (read)", __LINE__); | |
4940 | #else | |
4941 | /* Use ioctl command PIOCNMAP to get number of mappings. */ | |
4942 | if (ioctl (pi->ctl_fd, PIOCNMAP, &nmap) != 0) | |
4943 | proc_error (pi, "iterate_over_mappings (PIOCNMAP)", __LINE__); | |
4944 | ||
4945 | prmaps = (struct prmap *) alloca ((nmap + 1) * sizeof (*prmaps)); | |
4946 | if (ioctl (pi->ctl_fd, PIOCMAP, prmaps) != 0) | |
4947 | proc_error (pi, "iterate_over_mappings (PIOCMAP)", __LINE__); | |
4948 | #endif | |
4949 | ||
4950 | for (prmap = prmaps; nmap > 0; prmap++, nmap--) | |
4951 | if ((funcstat = (*func) (prmap, child_func, data)) != 0) | |
0a86f364 JB |
4952 | { |
4953 | do_cleanups (cleanups); | |
4954 | return funcstat; | |
4955 | } | |
831e682e | 4956 | |
0a86f364 | 4957 | do_cleanups (cleanups); |
831e682e MS |
4958 | return 0; |
4959 | } | |
4960 | ||
77382aee | 4961 | /* Implements the to_find_memory_regions method. Calls an external |
b8edc417 | 4962 | function for each memory region. |
77382aee | 4963 | Returns the integer value returned by the callback. */ |
be4d1333 MS |
4964 | |
4965 | static int | |
19958708 | 4966 | find_memory_regions_callback (struct prmap *map, |
b8edc417 | 4967 | find_memory_region_ftype func, void *data) |
be4d1333 | 4968 | { |
bf75638e | 4969 | return (*func) ((CORE_ADDR) map->pr_vaddr, |
19958708 | 4970 | map->pr_size, |
be4d1333 MS |
4971 | (map->pr_mflags & MA_READ) != 0, |
4972 | (map->pr_mflags & MA_WRITE) != 0, | |
19958708 | 4973 | (map->pr_mflags & MA_EXEC) != 0, |
4f69f4c2 | 4974 | 1, /* MODIFIED is unknown, pass it as true. */ |
be4d1333 MS |
4975 | data); |
4976 | } | |
4977 | ||
77382aee PA |
4978 | /* External interface. Calls a callback function once for each |
4979 | mapped memory region in the child process, passing as arguments: | |
4980 | ||
4981 | CORE_ADDR virtual_address, | |
4982 | unsigned long size, | |
4983 | int read, TRUE if region is readable by the child | |
4984 | int write, TRUE if region is writable by the child | |
4985 | int execute TRUE if region is executable by the child. | |
4986 | ||
4987 | Stops iterating and returns the first non-zero value returned by | |
4988 | the callback. */ | |
be4d1333 MS |
4989 | |
4990 | static int | |
2e73927c TT |
4991 | proc_find_memory_regions (struct target_ops *self, |
4992 | find_memory_region_ftype func, void *data) | |
be4d1333 | 4993 | { |
dfd4cc63 | 4994 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
be4d1333 | 4995 | |
19958708 | 4996 | return iterate_over_mappings (pi, func, data, |
be4d1333 MS |
4997 | find_memory_regions_callback); |
4998 | } | |
4999 | ||
77382aee | 5000 | /* Returns an ascii representation of a memory mapping's flags. */ |
c3f6f71d | 5001 | |
388faa48 | 5002 | static char * |
5ae5f592 | 5003 | mappingflags (long flags) |
388faa48 MS |
5004 | { |
5005 | static char asciiflags[8]; | |
5006 | ||
5007 | strcpy (asciiflags, "-------"); | |
5008 | #if defined (MA_PHYS) | |
5009 | if (flags & MA_PHYS) | |
5010 | asciiflags[0] = 'd'; | |
5011 | #endif | |
5012 | if (flags & MA_STACK) | |
5013 | asciiflags[1] = 's'; | |
5014 | if (flags & MA_BREAK) | |
5015 | asciiflags[2] = 'b'; | |
5016 | if (flags & MA_SHARED) | |
5017 | asciiflags[3] = 's'; | |
5018 | if (flags & MA_READ) | |
5019 | asciiflags[4] = 'r'; | |
5020 | if (flags & MA_WRITE) | |
5021 | asciiflags[5] = 'w'; | |
5022 | if (flags & MA_EXEC) | |
5023 | asciiflags[6] = 'x'; | |
5024 | return (asciiflags); | |
5025 | } | |
5026 | ||
77382aee PA |
5027 | /* Callback function, does the actual work for 'info proc |
5028 | mappings'. */ | |
831e682e | 5029 | |
831e682e | 5030 | static int |
b8edc417 | 5031 | info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore, |
e9ef4f39 | 5032 | void *unused) |
831e682e | 5033 | { |
0b62613e | 5034 | unsigned int pr_off; |
831e682e | 5035 | |
831e682e | 5036 | #ifdef PCAGENT /* Horrible hack: only defined on Solaris 2.6+ */ |
0b62613e | 5037 | pr_off = (unsigned int) map->pr_offset; |
831e682e | 5038 | #else |
0b62613e | 5039 | pr_off = map->pr_off; |
831e682e | 5040 | #endif |
0b62613e | 5041 | |
f5656ead | 5042 | if (gdbarch_addr_bit (target_gdbarch ()) == 32) |
f6a96b83 | 5043 | printf_filtered ("\t%#10lx %#10lx %#10lx %#10x %7s\n", |
0b62613e PA |
5044 | (unsigned long) map->pr_vaddr, |
5045 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5046 | (unsigned long) map->pr_size, |
0b62613e PA |
5047 | pr_off, |
5048 | mappingflags (map->pr_mflags)); | |
5049 | else | |
f6a96b83 | 5050 | printf_filtered (" %#18lx %#18lx %#10lx %#10x %7s\n", |
0b62613e PA |
5051 | (unsigned long) map->pr_vaddr, |
5052 | (unsigned long) map->pr_vaddr + map->pr_size - 1, | |
f6a96b83 | 5053 | (unsigned long) map->pr_size, |
0b62613e PA |
5054 | pr_off, |
5055 | mappingflags (map->pr_mflags)); | |
831e682e MS |
5056 | |
5057 | return 0; | |
5058 | } | |
5059 | ||
77382aee | 5060 | /* Implement the "info proc mappings" subcommand. */ |
388faa48 MS |
5061 | |
5062 | static void | |
5063 | info_proc_mappings (procinfo *pi, int summary) | |
5064 | { | |
388faa48 | 5065 | if (summary) |
0df8b418 | 5066 | return; /* No output for summary mode. */ |
388faa48 | 5067 | |
a3f17187 | 5068 | printf_filtered (_("Mapped address spaces:\n\n")); |
f5656ead | 5069 | if (gdbarch_ptr_bit (target_gdbarch ()) == 32) |
0b62613e PA |
5070 | printf_filtered ("\t%10s %10s %10s %10s %7s\n", |
5071 | "Start Addr", | |
5072 | " End Addr", | |
5073 | " Size", | |
5074 | " Offset", | |
5075 | "Flags"); | |
5076 | else | |
5077 | printf_filtered (" %18s %18s %10s %10s %7s\n", | |
5078 | "Start Addr", | |
5079 | " End Addr", | |
5080 | " Size", | |
5081 | " Offset", | |
5082 | "Flags"); | |
388faa48 | 5083 | |
831e682e | 5084 | iterate_over_mappings (pi, NULL, NULL, info_mappings_callback); |
388faa48 MS |
5085 | printf_filtered ("\n"); |
5086 | } | |
5087 | ||
77382aee | 5088 | /* Implement the "info proc" command. */ |
c3f6f71d JM |
5089 | |
5090 | static void | |
7bc112c1 | 5091 | procfs_info_proc (struct target_ops *ops, const char *args, |
145b16a9 | 5092 | enum info_proc_what what) |
c906108c | 5093 | { |
c3f6f71d | 5094 | struct cleanup *old_chain; |
388faa48 MS |
5095 | procinfo *process = NULL; |
5096 | procinfo *thread = NULL; | |
5097 | char **argv = NULL; | |
5098 | char *tmp = NULL; | |
5099 | int pid = 0; | |
5100 | int tid = 0; | |
5101 | int mappings = 0; | |
c906108c | 5102 | |
145b16a9 UW |
5103 | switch (what) |
5104 | { | |
5105 | case IP_MINIMAL: | |
5106 | break; | |
5107 | ||
5108 | case IP_MAPPINGS: | |
5109 | case IP_ALL: | |
5110 | mappings = 1; | |
5111 | break; | |
5112 | ||
5113 | default: | |
5114 | error (_("Not supported on this target.")); | |
5115 | } | |
5116 | ||
c3f6f71d JM |
5117 | old_chain = make_cleanup (null_cleanup, 0); |
5118 | if (args) | |
0fda6bd2 | 5119 | { |
d1a41061 PP |
5120 | argv = gdb_buildargv (args); |
5121 | make_cleanup_freeargv (argv); | |
0fda6bd2 | 5122 | } |
c3f6f71d JM |
5123 | while (argv != NULL && *argv != NULL) |
5124 | { | |
5125 | if (isdigit (argv[0][0])) | |
5126 | { | |
5127 | pid = strtoul (argv[0], &tmp, 10); | |
5128 | if (*tmp == '/') | |
5129 | tid = strtoul (++tmp, NULL, 10); | |
5130 | } | |
5131 | else if (argv[0][0] == '/') | |
5132 | { | |
5133 | tid = strtoul (argv[0] + 1, NULL, 10); | |
5134 | } | |
c3f6f71d JM |
5135 | argv++; |
5136 | } | |
5137 | if (pid == 0) | |
dfd4cc63 | 5138 | pid = ptid_get_pid (inferior_ptid); |
c3f6f71d | 5139 | if (pid == 0) |
8a3fe4f8 | 5140 | error (_("No current process: you must name one.")); |
c3f6f71d | 5141 | else |
c906108c | 5142 | { |
c3f6f71d | 5143 | /* Have pid, will travel. |
0df8b418 | 5144 | First see if it's a process we're already debugging. */ |
c3f6f71d JM |
5145 | process = find_procinfo (pid, 0); |
5146 | if (process == NULL) | |
5147 | { | |
19958708 | 5148 | /* No. So open a procinfo for it, but |
c3f6f71d JM |
5149 | remember to close it again when finished. */ |
5150 | process = create_procinfo (pid, 0); | |
004527cb | 5151 | make_cleanup (do_destroy_procinfo_cleanup, process); |
c3f6f71d JM |
5152 | if (!open_procinfo_files (process, FD_CTL)) |
5153 | proc_error (process, "info proc, open_procinfo_files", __LINE__); | |
5154 | } | |
c906108c | 5155 | } |
c3f6f71d JM |
5156 | if (tid != 0) |
5157 | thread = create_procinfo (pid, tid); | |
5158 | ||
5159 | if (process) | |
5160 | { | |
a3f17187 | 5161 | printf_filtered (_("process %d flags:\n"), process->pid); |
c3f6f71d JM |
5162 | proc_prettyprint_flags (proc_flags (process), 1); |
5163 | if (proc_flags (process) & (PR_STOPPED | PR_ISTOP)) | |
5164 | proc_prettyprint_why (proc_why (process), proc_what (process), 1); | |
5165 | if (proc_get_nthreads (process) > 1) | |
19958708 | 5166 | printf_filtered ("Process has %d threads.\n", |
c3f6f71d JM |
5167 | proc_get_nthreads (process)); |
5168 | } | |
5169 | if (thread) | |
5170 | { | |
a3f17187 | 5171 | printf_filtered (_("thread %d flags:\n"), thread->tid); |
c3f6f71d JM |
5172 | proc_prettyprint_flags (proc_flags (thread), 1); |
5173 | if (proc_flags (thread) & (PR_STOPPED | PR_ISTOP)) | |
5174 | proc_prettyprint_why (proc_why (thread), proc_what (thread), 1); | |
5175 | } | |
5176 | ||
388faa48 MS |
5177 | if (mappings) |
5178 | { | |
5179 | info_proc_mappings (process, 0); | |
5180 | } | |
5181 | ||
c3f6f71d | 5182 | do_cleanups (old_chain); |
c906108c SS |
5183 | } |
5184 | ||
9185ddce JB |
5185 | /* Modify the status of the system call identified by SYSCALLNUM in |
5186 | the set of syscalls that are currently traced/debugged. | |
5187 | ||
5188 | If ENTRY_OR_EXIT is set to PR_SYSENTRY, then the entry syscalls set | |
0df8b418 | 5189 | will be updated. Otherwise, the exit syscalls set will be updated. |
9185ddce | 5190 | |
0df8b418 | 5191 | If MODE is FLAG_SET, then traces will be enabled. Otherwise, they |
9185ddce JB |
5192 | will be disabled. */ |
5193 | ||
5194 | static void | |
5195 | proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, | |
77382aee | 5196 | int mode, int from_tty) |
9185ddce JB |
5197 | { |
5198 | sysset_t *sysset; | |
77382aee | 5199 | |
9185ddce JB |
5200 | if (entry_or_exit == PR_SYSENTRY) |
5201 | sysset = proc_get_traced_sysentry (pi, NULL); | |
5202 | else | |
5203 | sysset = proc_get_traced_sysexit (pi, NULL); | |
5204 | ||
5205 | if (sysset == NULL) | |
5206 | proc_error (pi, "proc-trace, get_traced_sysset", __LINE__); | |
5207 | ||
5208 | if (mode == FLAG_SET) | |
5209 | gdb_praddsysset (sysset, syscallnum); | |
5210 | else | |
5211 | gdb_prdelsysset (sysset, syscallnum); | |
5212 | ||
5213 | if (entry_or_exit == PR_SYSENTRY) | |
5214 | { | |
5215 | if (!proc_set_traced_sysentry (pi, sysset)) | |
77382aee | 5216 | proc_error (pi, "proc-trace, set_traced_sysentry", __LINE__); |
9185ddce JB |
5217 | } |
5218 | else | |
5219 | { | |
5220 | if (!proc_set_traced_sysexit (pi, sysset)) | |
77382aee | 5221 | proc_error (pi, "proc-trace, set_traced_sysexit", __LINE__); |
9185ddce JB |
5222 | } |
5223 | } | |
5224 | ||
c3f6f71d | 5225 | static void |
fba45db2 | 5226 | proc_trace_syscalls (char *args, int from_tty, int entry_or_exit, int mode) |
c906108c | 5227 | { |
c3f6f71d | 5228 | procinfo *pi; |
c906108c | 5229 | |
dfd4cc63 | 5230 | if (ptid_get_pid (inferior_ptid) <= 0) |
8a3fe4f8 | 5231 | error (_("you must be debugging a process to use this command.")); |
c906108c | 5232 | |
c3f6f71d | 5233 | if (args == NULL || args[0] == 0) |
e2e0b3e5 | 5234 | error_no_arg (_("system call to trace")); |
c3f6f71d | 5235 | |
dfd4cc63 | 5236 | pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
c3f6f71d JM |
5237 | if (isdigit (args[0])) |
5238 | { | |
9185ddce | 5239 | const int syscallnum = atoi (args); |
c906108c | 5240 | |
9185ddce | 5241 | proc_trace_syscalls_1 (pi, syscallnum, entry_or_exit, mode, from_tty); |
c3f6f71d JM |
5242 | } |
5243 | } | |
5244 | ||
19958708 | 5245 | static void |
fba45db2 | 5246 | proc_trace_sysentry_cmd (char *args, int from_tty) |
c906108c | 5247 | { |
c3f6f71d JM |
5248 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_SET); |
5249 | } | |
c906108c | 5250 | |
19958708 | 5251 | static void |
fba45db2 | 5252 | proc_trace_sysexit_cmd (char *args, int from_tty) |
c3f6f71d JM |
5253 | { |
5254 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_SET); | |
c906108c | 5255 | } |
c906108c | 5256 | |
19958708 | 5257 | static void |
fba45db2 | 5258 | proc_untrace_sysentry_cmd (char *args, int from_tty) |
c3f6f71d JM |
5259 | { |
5260 | proc_trace_syscalls (args, from_tty, PR_SYSENTRY, FLAG_RESET); | |
5261 | } | |
5262 | ||
19958708 | 5263 | static void |
fba45db2 | 5264 | proc_untrace_sysexit_cmd (char *args, int from_tty) |
c906108c | 5265 | { |
c3f6f71d JM |
5266 | proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET); |
5267 | } | |
c906108c | 5268 | |
c906108c | 5269 | |
a0911fd0 MR |
5270 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
5271 | extern void _initialize_procfs (void); | |
5272 | ||
c906108c | 5273 | void |
fba45db2 | 5274 | _initialize_procfs (void) |
c906108c | 5275 | { |
27087a3d JB |
5276 | observer_attach_inferior_created (procfs_inferior_created); |
5277 | ||
19958708 | 5278 | add_com ("proc-trace-entry", no_class, proc_trace_sysentry_cmd, |
1bedd215 | 5279 | _("Give a trace of entries into the syscall.")); |
19958708 | 5280 | add_com ("proc-trace-exit", no_class, proc_trace_sysexit_cmd, |
1bedd215 | 5281 | _("Give a trace of exits from the syscall.")); |
19958708 | 5282 | add_com ("proc-untrace-entry", no_class, proc_untrace_sysentry_cmd, |
1bedd215 | 5283 | _("Cancel a trace of entries into the syscall.")); |
19958708 | 5284 | add_com ("proc-untrace-exit", no_class, proc_untrace_sysexit_cmd, |
1bedd215 | 5285 | _("Cancel a trace of exits from the syscall.")); |
c3f6f71d JM |
5286 | } |
5287 | ||
5288 | /* =================== END, GDB "MODULE" =================== */ | |
5289 | ||
5290 | ||
5291 | ||
77382aee PA |
5292 | /* miscellaneous stubs: */ |
5293 | ||
5294 | /* The following satisfy a few random symbols mostly created by the | |
5295 | solaris threads implementation, which I will chase down later. */ | |
c3f6f71d | 5296 | |
77382aee PA |
5297 | /* Return a pid for which we guarantee we will be able to find a |
5298 | 'live' procinfo. */ | |
c3f6f71d | 5299 | |
39f77062 | 5300 | ptid_t |
fba45db2 | 5301 | procfs_first_available (void) |
c3f6f71d | 5302 | { |
39f77062 | 5303 | return pid_to_ptid (procinfo_list ? procinfo_list->pid : -1); |
c3f6f71d | 5304 | } |
be4d1333 MS |
5305 | |
5306 | /* =================== GCORE .NOTE "MODULE" =================== */ | |
05b4bd79 PA |
5307 | #if defined (PIOCOPENLWP) || defined (PCAGENT) |
5308 | /* gcore only implemented on solaris (so far) */ | |
be4d1333 MS |
5309 | |
5310 | static char * | |
19958708 | 5311 | procfs_do_thread_registers (bfd *obfd, ptid_t ptid, |
2020b7ab | 5312 | char *note_data, int *note_size, |
2ea28649 | 5313 | enum gdb_signal stop_signal) |
be4d1333 | 5314 | { |
594f7785 | 5315 | struct regcache *regcache = get_thread_regcache (ptid); |
be4d1333 MS |
5316 | gdb_gregset_t gregs; |
5317 | gdb_fpregset_t fpregs; | |
5318 | unsigned long merged_pid; | |
75125405 | 5319 | struct cleanup *old_chain; |
be4d1333 | 5320 | |
dfd4cc63 | 5321 | merged_pid = ptid_get_lwp (ptid) << 16 | ptid_get_pid (ptid); |
be4d1333 | 5322 | |
75125405 DJ |
5323 | /* This part is the old method for fetching registers. |
5324 | It should be replaced by the newer one using regsets | |
5325 | once it is implemented in this platform: | |
29082443 | 5326 | gdbarch_iterate_over_regset_sections(). */ |
75125405 DJ |
5327 | |
5328 | old_chain = save_inferior_ptid (); | |
5329 | inferior_ptid = ptid; | |
5330 | target_fetch_registers (regcache, -1); | |
5331 | ||
594f7785 | 5332 | fill_gregset (regcache, &gregs, -1); |
4c490650 | 5333 | #if defined (NEW_PROC_API) |
65554fef MS |
5334 | note_data = (char *) elfcore_write_lwpstatus (obfd, |
5335 | note_data, | |
5336 | note_size, | |
19958708 | 5337 | merged_pid, |
65554fef MS |
5338 | stop_signal, |
5339 | &gregs); | |
5340 | #else | |
be4d1333 | 5341 | note_data = (char *) elfcore_write_prstatus (obfd, |
65554fef MS |
5342 | note_data, |
5343 | note_size, | |
19958708 | 5344 | merged_pid, |
be4d1333 | 5345 | stop_signal, |
65554fef MS |
5346 | &gregs); |
5347 | #endif | |
594f7785 | 5348 | fill_fpregset (regcache, &fpregs, -1); |
be4d1333 MS |
5349 | note_data = (char *) elfcore_write_prfpreg (obfd, |
5350 | note_data, | |
5351 | note_size, | |
5352 | &fpregs, | |
5353 | sizeof (fpregs)); | |
75125405 DJ |
5354 | |
5355 | do_cleanups (old_chain); | |
5356 | ||
be4d1333 MS |
5357 | return note_data; |
5358 | } | |
5359 | ||
5360 | struct procfs_corefile_thread_data { | |
5361 | bfd *obfd; | |
5362 | char *note_data; | |
5363 | int *note_size; | |
2ea28649 | 5364 | enum gdb_signal stop_signal; |
be4d1333 MS |
5365 | }; |
5366 | ||
5367 | static int | |
65554fef | 5368 | procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data) |
be4d1333 MS |
5369 | { |
5370 | struct procfs_corefile_thread_data *args = data; | |
be4d1333 | 5371 | |
2689673f | 5372 | if (pi != NULL) |
be4d1333 | 5373 | { |
dfd4cc63 | 5374 | ptid_t ptid = ptid_build (pi->pid, thread->tid, 0); |
f4a14ae6 | 5375 | |
75125405 | 5376 | args->note_data = procfs_do_thread_registers (args->obfd, ptid, |
19958708 | 5377 | args->note_data, |
2020b7ab PA |
5378 | args->note_size, |
5379 | args->stop_signal); | |
be4d1333 MS |
5380 | } |
5381 | return 0; | |
5382 | } | |
5383 | ||
a223f1e7 JB |
5384 | static int |
5385 | find_signalled_thread (struct thread_info *info, void *data) | |
5386 | { | |
a493e3e2 | 5387 | if (info->suspend.stop_signal != GDB_SIGNAL_0 |
a223f1e7 JB |
5388 | && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid)) |
5389 | return 1; | |
5390 | ||
5391 | return 0; | |
5392 | } | |
5393 | ||
2ea28649 | 5394 | static enum gdb_signal |
a223f1e7 JB |
5395 | find_stop_signal (void) |
5396 | { | |
5397 | struct thread_info *info = | |
5398 | iterate_over_threads (find_signalled_thread, NULL); | |
5399 | ||
5400 | if (info) | |
16c381f0 | 5401 | return info->suspend.stop_signal; |
a223f1e7 | 5402 | else |
a493e3e2 | 5403 | return GDB_SIGNAL_0; |
a223f1e7 JB |
5404 | } |
5405 | ||
be4d1333 | 5406 | static char * |
fc6691b2 | 5407 | procfs_make_note_section (struct target_ops *self, bfd *obfd, int *note_size) |
be4d1333 MS |
5408 | { |
5409 | struct cleanup *old_chain; | |
5410 | gdb_gregset_t gregs; | |
5411 | gdb_fpregset_t fpregs; | |
5412 | char fname[16] = {'\0'}; | |
5413 | char psargs[80] = {'\0'}; | |
dfd4cc63 | 5414 | procinfo *pi = find_procinfo_or_die (ptid_get_pid (inferior_ptid), 0); |
be4d1333 | 5415 | char *note_data = NULL; |
6dbdc4a3 | 5416 | char *inf_args; |
be4d1333 | 5417 | struct procfs_corefile_thread_data thread_args; |
0b62613e | 5418 | gdb_byte *auxv; |
4e73f23d | 5419 | int auxv_len; |
2ea28649 | 5420 | enum gdb_signal stop_signal; |
be4d1333 MS |
5421 | |
5422 | if (get_exec_file (0)) | |
5423 | { | |
9f37bbcc | 5424 | strncpy (fname, lbasename (get_exec_file (0)), sizeof (fname)); |
4e2af517 JM |
5425 | fname[sizeof (fname) - 1] = 0; |
5426 | strncpy (psargs, get_exec_file (0), sizeof (psargs)); | |
5427 | psargs[sizeof (psargs) - 1] = 0; | |
6dbdc4a3 MS |
5428 | |
5429 | inf_args = get_inferior_args (); | |
5430 | if (inf_args && *inf_args && | |
5431 | strlen (inf_args) < ((int) sizeof (psargs) - (int) strlen (psargs))) | |
be4d1333 | 5432 | { |
19958708 | 5433 | strncat (psargs, " ", |
be4d1333 | 5434 | sizeof (psargs) - strlen (psargs)); |
19958708 | 5435 | strncat (psargs, inf_args, |
be4d1333 MS |
5436 | sizeof (psargs) - strlen (psargs)); |
5437 | } | |
5438 | } | |
5439 | ||
19958708 RM |
5440 | note_data = (char *) elfcore_write_prpsinfo (obfd, |
5441 | note_data, | |
5442 | note_size, | |
5443 | fname, | |
be4d1333 MS |
5444 | psargs); |
5445 | ||
651c8d2d PA |
5446 | stop_signal = find_stop_signal (); |
5447 | ||
3e3420f6 PA |
5448 | #ifdef NEW_PROC_API |
5449 | fill_gregset (get_current_regcache (), &gregs, -1); | |
5450 | note_data = elfcore_write_pstatus (obfd, note_data, note_size, | |
dfd4cc63 | 5451 | ptid_get_pid (inferior_ptid), |
3e3420f6 PA |
5452 | stop_signal, &gregs); |
5453 | #endif | |
5454 | ||
be4d1333 MS |
5455 | thread_args.obfd = obfd; |
5456 | thread_args.note_data = note_data; | |
5457 | thread_args.note_size = note_size; | |
651c8d2d | 5458 | thread_args.stop_signal = stop_signal; |
3e43a32a MS |
5459 | proc_iterate_over_threads (pi, procfs_corefile_thread_callback, |
5460 | &thread_args); | |
2689673f | 5461 | note_data = thread_args.note_data; |
be4d1333 | 5462 | |
13547ab6 DJ |
5463 | auxv_len = target_read_alloc (¤t_target, TARGET_OBJECT_AUXV, |
5464 | NULL, &auxv); | |
4e73f23d RM |
5465 | if (auxv_len > 0) |
5466 | { | |
5467 | note_data = elfcore_write_note (obfd, note_data, note_size, | |
5468 | "CORE", NT_AUXV, auxv, auxv_len); | |
5469 | xfree (auxv); | |
5470 | } | |
5471 | ||
be4d1333 MS |
5472 | return note_data; |
5473 | } | |
05b4bd79 | 5474 | #else /* !Solaris */ |
65554fef | 5475 | static char * |
fc6691b2 | 5476 | procfs_make_note_section (struct target_ops *self, bfd *obfd, int *note_size) |
65554fef | 5477 | { |
8a3fe4f8 | 5478 | error (_("gcore not implemented for this host.")); |
65554fef MS |
5479 | return NULL; /* lint */ |
5480 | } | |
05b4bd79 | 5481 | #endif /* Solaris */ |
be4d1333 | 5482 | /* =================== END GCORE .NOTE "MODULE" =================== */ |